Thanks, glad you liked it!
No sound is blamed on my laziness. It would've taken only 30 minutes to fire up BFXR, create some samples, add to Godot and code.
Thomas Was Alone is always an inspiration for platformers, but it's more focusing on storytelling. Also graphically I started with pixel art (like you can see the detail of pipes), but that would've taken a lot of time (I wasted 6 hours perfecting tiles, only the pipes made it through).