Honestly pretty good game. Genuinely like playing it but needs work.
1. No protection from instantly dying.
2. The paddles and paddle move effects don't look very good, which is pretty important imo. But instead of just updating them perhaps allow different styles of paddles that have different effects on gameplay? Or even just make the paddles cosmetic. Like flaming paddles that imbue the hero with short lived fire damage or any element depending on the type. Like ice or wind paddles. The hero stays in the air for a while if things are going right anyway. Or maybe enemy themed paddles like slime and golbin.
3. Backpack system could be more interesting if more position based effects were added to items or combos.
4. The slot machine right now isn't very fun to play. I lose if I try and time the slots or I lose if I rapidly mash the lever. Both lose me money, one loses me time. I tend to just skip the slot machine.