The concept was executed super well. The controls and level design were on point. I also loved the art style and music, it almost feels like a fully finished game. I ran into a couple bugs though. First, the first time I collected a slime heart, I fell out of the level and had to restart the game. Second, when I got to what I assume was the end of the game, I somehow got launched out of the map and Unity crashed. Other than that, this is an incredibly polished experience, and I could totally see this expanded into a fully released game. Congrats!