Movement shouldn't be higher resolution since the resolution of the whole game is locked in to 256 x 240 and should be integer scaling, but I'll make sure when I look in the settings. Definitely adding more room variety post jam as well as making some tweaks to the dungeon algorithm and enemies to make it feel a bit more intentional. Thanks for the feedback!
Looked at it again and I think I kind of misremembered/misinterpreted a feeling I got while playing when I was writing the comment. The resolution is 100%, but there's a few situations like this where the enemy runs its course horizontally while partially overlapping the background tiles, which felt a bit off.
Ah, yeah, that's actually intentional since it was the only way I could fix that enemy's collision before the deadline. But I agree that it definitely looks a bit off and could be improved in the post jam version. Not sure if I'll fix that in particular but I'm making a note of it, definitely want to focus more on the big issues first. Screenshot helped, thanks!