Very nice gameplay and aesthetics! Reminded me of some old DOS games as well as Spelunky.
Criticisms/Suggestions:
Could use a little tutorial, the game requires some fast reactions so there's not much time to learn how to use bombs and such.
It's also not immediately clear you can interact with the shopkeeper (or that he is a shopkeeper). First time I encountered him I thought it was a checkpoint.
Ability to skip the starting animations would be appreciated, they're nice the first time, but not after you've had to restart the game several times.
The game over sound effect was really loud compared to other audio, at least on my speakers. Also, the game over lasts longer than it has to - it'd probably be better to let player push a button to pass it than put it on a timer.
Minor point: Not sure why you've added the tag "roguelite" since there doesn't seem to be any permanent upgrades. From what I could see, it's a full-on "roguelike".