This is actually really fun! Though if you want to continue working on this I'd suggest making the player a different color altogether like blue or something.
And I think I found two bugs:
- If you turn the player green and get hit, rewinding time does not bring back the player
- If you turn the player green you can't collide with enemies (i.e. you don't die when touching them, only when touching their bullets), don't know if this might be intentional or not?
Very fun though and really impressive for a game made in 3 hours :)