I always find it cool in games when you can gain the boss' abilities, that's such an underused mechanic, it's always so exciting to see a boss use something and then gaining that power for yourself. Makes every encounter feel worth while. Adding a wheel to the mix was interesting, I think it has its ups and downs, on the upside it creates a lot of fun uncertainty, but on the downside the very likely possibility of getting repeats both in terms of bosses and the abilities you get from them would make it feel like the game's momentum has stopped since you didn't gain anything new after winning. I imagine that the super tight jam deadline didn't allow you to make a mechanic where if you pick up a power-up, it's no longer on the wheel when you destroy its respective boss, and if you get all of a boss' abilities, then the boss gets removed from the larger wheel. I think that would've really completed this game, but as it stands you still did a great job here