I really liked the intro, the music, the fact there was a town and NPCs (though they were a bit chatty at times). The whole western fantasy was a nice touch.
The shooting is nice, both the animation and sound effects, plus the fact you can aim in multiple directions. I did find the jump a bit abrupt and weightless though, and I struggled quite a bit on the platforming (but like other browser Godot games, it doesn't seem to recognize my Xbox gamepad, which I'm sure didn't help).
I also had trouble with the bats: they take quite a few hits until you improve your gun and they rush you without ever stopping or getting back their distance, so if you're hit once, you're guaranteed to get hit more until you can outrun it and shoot it. It's frustrating and I died quite a few times at the beginning of the game because of that. Despite that, I enjoyed the enemy variety. I would have liked more feedback when you shoot them though.
Overall, the metroidvania aspect was well done. By the end I was really anticipating the roll upgrade that had been taunting me the whole game. It felt a bit linear at times, but it does open a bit once you have all the upgrades and you're looking for the collectibles.
I appreciate that the escape sequence is pure spectacle and not actually timed. The screen shake and the sound effects really did sell the urgency of it it despite how much I struggled to get out of the final shaft.
Finished in 22m with 14 collectibles. It was pretty good!