Really fun concept!! I always thought that a roguelike style game where you or another player builds the locations and enemies you go through would be super intriguing! I think that it would be really fun to play off of upgrading the strength of enemies which would in turn give you more rewards for placing those specific ones. You did a good job on the length of the game and the only part that I was confused about at first was that you had to take one specific side of the exit to go to the next stage. I got stuck walking into the back of it at first and walked in circles around the level for 20 seconds or so lol.