Great game overall, with a nice implementation of different platformers tropes.
If anything I just have a few problems/nitpicks:
- Hitboxes can feel weird sometimes with the spikes and falling blocks, getting me killed though i'm far away.
- Some levels should get a little playtest, especially the end on Level 11 fell way too difficult with the row of falling boxes .
- I see that you draw a lot of inspiration from VVVVVV to create the world of the game, but the robot seems more detailed; are you going to keep everything simplistic or do you want to change the artwork to fit in line with the robot.
- Some kind of intro level would be fine, but that is just my opinion.