I've noticed that there's not a whole lot of material out there to help new players learn how to play this game. All I really see on the forums are reference material type guides by Voyle. These are useful, and they helped me a lot when I decided to stop losing every single game I played back when I started this game. I went on a 10 game losing streak when I first started this game, and after I did some research using what few guides I found on the forums, I was able to develop a somewhat reasonable strategy. Ever since then, I've been making modifications to it as I gain more experience, and I have not lost a game since.
I think it can be pretty frustrating to new players though if they have not yet developed their own strategy/build. So, I decided to post the general strategy I follow in my games. I'll also give a brief explanation about why I chose some of the things I do. I'm not saying my strategy is the best, and I'm sure it can be improved, but I have not lost a game with this strategy yet, even to people with much higher ratings than me(it takes forever to get high rating in this game since you get so few points per game >.>) . I hope by doing this, new players will have easy access to a good strategy they can use, and the overall skill level of players in this game will increase as well. Furthermore, if you wish to critique my strategy or post your own for others to critique, I would be very thankful, and I think it would be a great help to the community.
1. First send 150-200 gold worth of Moopsys when the timer reaches 0. The ammount of Moopsys I send depends on the map as some have longer travel distances than others. If the travel distance is shorter, you will need more money for towers to stop your opponent's initial wave of Moopsys. If the travel distance is longer, you can spend more money on your initial wave since you have more time to prepare for your opponents wave of Moopsys. One thing to note is that stopping your opponents wave is a must. At this stage of the game, Moopsy only has health, so use arrow towers ONLY. You will get a huge advantage if you can get more battlepoints than your opponent here.
2. Invest in maxxing out your mines to 6/6 until you run out of BP. You will need to be gaining gold much faster to be able to sustain sending a full wave of Moopsy out when the timer reaches 0 every time.
*Note: From here on out, I won't really be going into much detail on exactly what to do with your towers, because that is an art in it's own right. I will explain which towers are good for enemies your opponent uses though. It is very important that you balance your priorities. Make sure your defense is strong enough to stop your opponents wave very fast. The more you can widen the gap between the BP you and your opponent have, the better you will do, and often I end up with twice as much BP than my opponent which helps me win the game fairly easily.
3. Sometimes it is tough to decide how much to invest in your second wave. I tend to do different things based on how the game is going so far. Usually though, I either send about 200 gold worth of Moopsy, or I wait till my opponent sends and send at the same time. The reason I send a small wave of Moopsy though is so I can continue to gain battle points right away. You want to upgrade your Moopsy to 1/3 as soon as you get 50 BP from this wave. You will be surprised how much farther your waves can get by just upgrading 1 point in Moopsy. This upgrade quickly pays for itself and more, and if you don't do it, your opponent can shut you out fairly quickly and keep you getting hardly any BP at all. If you get excess BP, continue investing in mines. Keep working on investing on getting your mines to 6/6 ASAP though.
4. Usually from now on, you will have enough money to sustain sending full waves of Moopsy as soon as you can. Once you have all your mines at 6/6, aim for unlocking "Sir Robert von Pretzel", who I will not refer to as Pretzel. If your opponent is any good, he will be getting Pretzels around the same time as you. As soon as you see his wave of Pretzels, build a few cannons. Contrary to popular belief, you don't need a whole lot of cannons to defend against Pretzel as one hit pretty much gets rid of their entire armour bar. I try to put a few spaces inbetween my cannons so they don't hit the same unit. If you see your opponent using Zoombots, stop EVERYTHING immediately and build as many cannons behind your arrow towers as possible. Zoombots get completely destroyed by cannons as they are mostly armour. It's important you do this though, because if you don't, the Zoombots will rush right past your silly arrow towers and your opponent will get a huge ammount of BP.
5. Next you want to upgrade your Pretzels to 3/3 ASAP. Doing so will help your Pretzel get very far into your opponents territory and get you a lot of BP. Also, start working on slowly upgrading your mines every once in a while. Inbetween waves, I tend to upgrade 1 mine. If I have a lvl 2 mine though, I will be 2 points into it inbetween waves as you can usually still get full waves of Pretzel off in time (especially once you have a fair ammount of them upgraded). If you think you can still get your wave off in time once you have a lot of points into level 2 mines, you could put 3 or 4 points into them instead.
6. Next you want to start focusing on spending your battlepoints on upgrades that will help you gain more BP per wave. I tend to put 1 point in the run, 1 in the little briefcase thing (srry, I never looked at the names xD), and then 3 in the money thing (the one that gives you more BP). Then I try to invest the upgrade that gives you additional units at the end of your wave (usually Moopsy). Once I got this upgrade at 3/3, I sometimes decide to fully upgrade my Moopsy as well, although you really don't need to, it is just pretty cheap. Also, you will want to upgrade the ammount of units you can send per wave, and decrease the cooldown between waves you send. The rest of the upgrades are fairly situational. For example, if your opponent has absolute no teslas, getting the shield upgrade will help a lot. Similarly, if you see your opponent has upgraded shields, build 1-3 teslas right away at the front of your defense as that is all you'll need to stop 1 shield. It is important you keep upgrading though, even if you don't know what you should upgrade, since it will help your waves get farther and possibly to your opponent's base.
7. Once I have all my mines at lvl 2 and 6/6, I try to unlock and fully upgrade Peptos right away. These units release a healing aura when they die, which will help your waves get much farther. Once I have Peptos, I usually alternate my waves. I'll send a wave of Peptos, then a wave of Pretzels. If you get some Peptos and Pretzels in their base, it is pretty much already GG, and I usually win games at this stage because not many players have a solid strategy. Continue investing in upgrades for your units though so they can get farther and you can get more in their base.
8. Slowly upgrade your mines to lvl 3 and put points in them in the same fashion you did for lvl 2. The rest of the game is pretty much about keeping your defense strong and slowly chipping away at your opponents base. Also, you should work on getting Stanley Clankerbottoms when you can as they will completely roll through your opponents defenses and go straight to his base unless they have invested some serious money on their defense. Even if they have, you will often be nearly fully upgraded at this point and they won't be able to stop Stanley anyways. In close games, it is often important to prepare for Stanleys because you do not want one wave of your opponents Stanleys taking out your base in 30 seconds flat when you had your opponent down to 10% HP.
That's pretty much the general layout of my current strategy for tower wars, as my games never get past the Stanley phase. From here on out, your gameplay will mostly improve just from experience in game. Of course, there's a lot of little tips and tricks to this game (such as juggling, which is controversial). I'll try to edit a "Tips" section at the end of this guide to include such things as I think of them. Also, as I said before, feel free to critique my strategy or post your own. I hope you all will have as much success as I have with this strategy in your own games, except in games against me ^^. Cheers.