I'm really torn on this game, I love your idea of building the game from the ground up, until eventually it gets out of hand. The narrator and main characters interactions are quite funny and I enjoy the humor, setting and mood of this game quite a bit. The art is also great. Simple, fitting, and expressive. Maybe the UI could use a little make over, but whatever.
Now, that said, my actual gameplay experience was mediocre. The first time I played I tried to jump over the hole in the ground to the right, fell into the cave and was stuck. I tried jumping my way out of there, but that didn't seem to work, I tried adding features but none seemed to help. With the knowledge from my second time playing the triple jump probably would have worked had I made it til there. I don't know if it's just a porting error when building for WebGL or if it's your canvas scaler that bugged out but it seems like part of the UI is out of the camera as you can see in this picture:
creep.PNG
Other than that I could not pick up the golden key collectible, the triple jump only worked the first time I tried it out and I still could not find a way past the ledges. Without much to do but add features I couldn't see or use because they're not in the camera I chose to stop playing. My only explanations are that either the game is bugged, or I just quit too soon, to my tip would be to either fix the bugs that hinder progress or make that part of the game shorter, so the player feels like he's actually progressing, even if just a little.
I really, honestly like ideas and presentation of this game, so I'm quite sad that my actual time with hasn't been that great. Your next step should be to iron out any bugs, have the game playtested a lot by friends and family and eventually make changes according to their feedback. Add a little bit more polishing to it and you'll have a game you could monetize.
At least that's my humble opinion. :)