The game is fun! Movement is good. Readability is good. The swinging doors(grey/uncolored) are a little bit buggy and the player can have a weird interaction where the door wont open unless your player stops touching the door. its a little strange and clunky.
This series inspired me to start working on my own game and I made a lot of progress. Thanks for doing all of this.
Puzzle 6 was the only puzzle I stumbled on, but I also found a little secondary way to solve this puzzle. Probably not intended..