I love the game so far! I had the DOS version (1.0) of "The Incredible Machine" as a kid and then later bought v3.
I few things I've noticed:
-The conveyors aren't as powerful as they were in the original. It used to be possible to cause a bowling ball to jump a ramp using them, but now they don't have much power at all. Even after using a gear arrangement to increase the speed it doesn’t do much.
-Lasers seem to be missing. There should be 3 different colored lasers and a color mixer for mixing them, Mirrors, and of course an outlet that only works when a matching color laser activates it.
-The fireworks are only one color. I know this isn’t as important, but little details like that made the game more fun.
-The yellow and black floor pieces should not be able to be destroyed by explosives, but currently they do. Only red brick should be destructible.
-The laser gun only shoots once when the trigger is pulled by rope. It should have a setting to keep shooting as long as the trigger is held, and a way to limit how many shots it can fire. Also it needs sound effects!
-Rope doesn’t burn when a flame is near it. I don’t remember if the original had this feature or not though. Just something to think about.
-The rocket and the missile need wicks that stick out more so they can be placed on flooring and be lit by a candle underneath.
-The Cat doesn't react to objects like bowling balls hitting him. He needs to run in the direction he's facing a little ways when objects touch him. It allows for more interesting puzzles.
-There is no fish tank or fish in the game yet! I assume it's going to be added though since "fish" is in the cat's description. A fish tank will have a fish swimming around and can be broken with moving objects. The cat gets attracted to broken fish tanks. A fish without the tank simply attracts the cat, although I don't think TIM 3 had the fish by itself, but TITM did.
-I think the record button should be moved away from the play button. I accidentally click it way too often!
-The pieces are still movable during the simulation! They do return to their original spot after it's stopped though, but still it's kind of cheating to be able to move parts around while it's running!
I’m sure there are more things I’m forgetting, but I’ll keep playing with it an update this list as I find more issues.