Wow, just played today. (5/23/15) Boy they really downgraded the game from what it originally was, terrible physics now and just awful pay wall. I love how I paid for a game that decided half way through to change to F2P and ruin their system. This game is failed in every way it can to its supporters.
I use to own everything in the shop, it was supposed to be a game you had to buy, now it's just an utter shell of itself and to make matters better they decide to either ditch the last physics system they had or edit it to the point of a terrible arcade-e little ♥♥♥♥ of physics.
My last investment in a game where I don't have a say in the way it's shaped. The developers can burn for all I care.
Don't pay for early access, just wait to uninstall it