I'm glad you liked the game, and thanks for playing it! And thanks for the feedback as well.
I'll definitely go change the color of the Gels. When I ported the game from a console application to a web application I tried to stay true to the 12 or 16 colors I had in a terminal window. But having them that color really does make them hard to see. I'll switch them to a lighter color.
I've seen the weird behavior where it moves you behind the Aquamentus before, but I haven't gotten around to actually diagnosing and fixing it. There's some collision code that tries to make it so you're not in the same space as an enemy and will move you out of the way if needed. I'm guessing that code needs to be a bit smarter. Originally, weird behavior like that was part of the "demake" charm, but it does make playing the game kind of annoying. I'll have to see if I can isolate that one and fix it as well.