This is a very interesting concept. Some of the levels took me multiple tries to beat, trying to find the correct order of pausing the player/enemies and speeding up and resetting the player. Some stages (especially the last one) got pretty difficult to switch between the buttons quick enough and I died a few times from not being able to input 2 commands fast enough, maybe also linking these controls to hot keys would solve this. Honestly other than that there isn't much to say about it. The game plays well and has a good difficulty curve from adding new mechanics/changing what the current mechanics already do. I wouldve happily kept playing until I reached the end, so I wouldn't complain if you added more levels! Also the Dev comments at the start of each level was a good touch and made me laugh a couple of times