Just now playing through it, and I'm enjoying it a lot! I'd love if there could be some sort of features where when you pick up an item, it would give you a brief note on how to use them, or possibly a pop-up of sorts to explain that the ability to use an item is blocked (like the keybind pop-up, but maybe a different color or crossed out sort of idea?). I got the goo slime TF first, and was very confused as to why I couldn't open the door with the diamond key, to the point where I was worried I'd found a bug until I restarted lol.
Also, while going through the machine in the blue slime pit, after it hit the end it just kinda froze there for a long while, and my character wasn't visible until I hit the mating song button. Then it just kinda pops back into existence near the end of the tube still as a white slime. I'm not sure if I was just not being patient enough and accidentally bugged it out, or if it is a bug, or something else?
Overall, though, I've been having a good time with the game! Thanks for the demo and keep up the good work!! 馃槉