The rewind feature is nice but the speed of rewind is too slow. Not sure if it's just in my machine, but the platform moves faster on upwards but slower on rewind. I think it would be better if the rewind of gun do not need to hold the mouse button and made it automatically move in short duration after getting shot.
The graphics aspect is really well done, that made me attract to this game in the first place. Maybe a bit more brightness to the lighting. Otherwise, it is good. Keep up the good work.