Pretty interesting game! It's kind of like Mario Maker where you need to prove that you can beat a level before you can submit it, but by forcing you to put in a certain amount of spikes, it creates a fun back-and-forth of planning and executing to make the level hard but not impossible to beat. Overall it feels pretty well-crafted and makes for a fun short and sweet adventure.
That being said, I do feel like the level design is a bit out-of-whack. The difficulty curve and leeway for spike requirements felt like it was going all over the place: I feel like it starts out strong, then gives you way too much leeway where there's barely any challenge, then suddenly the stairway levels have you pretty much figure out the one single way the developer intended with no leeway at all, then it goes back to giving way too much leeway once again. I suppose you could argue that it does give some variety, and I'm not totally against levels like the stairway where they are more rigid one-solution puzzles, but as a whole, the game just felt all over the place and didn't generate a smooth rising increase in difficulty, making it end with a bit of a whimper instead of a bang. Feels like it might need to decide whether to make rigid puzzle rooms like the stairway levels, or perhaps rooms with more leeway but you get bonus medals for putting more spikes over par so as to still have a challenge.
Still, while the levels were out-of-order and all that jazz, I still found the concept very cool and I'd love to play even more levels in this, so I'd consider that a good game jam result in that it was memorable and made me want more!
