haha, i had a fun time playing it.
First of all the graphics i think work super well.
The beat them all mechanics is always fun.
Its missing little things like using object to inflict damage (i feel i should be able to punch a bench to an enemy to hit him)
And mostly, its suuuper easy to cheese the game, just jump above enmies and if you hit while in the air you gain hyper air speed travel :) and for the boss.
The gambling theme integration was alright i think, i does create fun situation but since you can just ignore enemies and rush to the boss, it has little impact. Maybe prevent progression until current area enemies are still alive.
Add some weapons or things you can use against enemies