Cool idea kinda reminded me of JetpackJoyRide with vehicle upgrades.
Few things I would change:
- Put the camera ahead of the character so the player can react faster to what is comming
- Jump feels floaty
- Add collectibles (even simple coins) so levels do not feel empty
- Change controlls:
Jump - Space - I found myself losing multiple times coz I'm just used to jump with space - Doors selection - If your game controlls with keyboard stick to it, use '1', '2' and '3' for doors selection