The main mechanic for this game was using your shield to reflect fireballs? The boss at the end definitely was hectic and fun to have particle FX playing everywhere. It wasn't clear when I could reflect and when I would get hurt, so I ended up dodging the fireballs rather than reflecting them. Thankfully the boss appears to hurt over time to it was fun bullet-hell dance. With the jam being so short it's probably good to lean into the mechanic (what was the key + chest all about? why did the NPC's say I should take someone with me?).