Nice work! Big improvement over 1.2. Liked the levels a lot!
I might have more to say later, but I noticed a few bugs regarding sideways platforms - specifically, the one in Key 1.
- jumping off sideways platforms is possible and easy
- clipping through the platform while the swinging door is closing requires some more effort, but is still possible
- more generally, keys don't reappear when reentering a level, making it impossible to leave without using 'return to hub'
https://i.imgur.com/jwohRNk.mp4
Keep coding! I can just sense the massive potential in this project!