This is a pretty cool idea, and there's is very clearly a lot of effort here, but the controls combined with the lack of checkpoints really make it hard for me to want to play past the 2nd level. I do like the ideas that I did see!
I think you have to be pretty careful/economical with how many different buttons you ask the player to use and memorize. Simple things like: maybe instead of having a separate button to reset time, you just tap the same button you used to slow it down? Or to use your different time powers you could hold a button (I/Z in this case) then tap a direction to pick whether you wanted to slow down time/rewind/or some other power that you introduce.
Changes like that (Maybe not those exactly) would help make the controls a little easier to grasp and would allow you to build even harder/more complex levels!
Overall though, great job!