Liked my playthrough! It's not usual to have a tutorial level in jams, and I think this one was great to explain the basics in a playable way. Said that, the action was good, both player's kit and enemy bosses attack patterns. The gameplay loop felt well polished and it was a joy to go through the bosses. For the dealer, I think I would do something like limiting the number of items on sale every time you talk to him after a boss, to fight analysis paralysis when you open the shop and see all the different upgrades, and I would make the hub room smaller, so everything is on sight, but overall, very good job!