This was really fun! I ended up playing through a lot more attempts than I'd expected.
As others have mentioned, the input controls are a bit hard to use (the best I could manage was right hand on arrow keys and left hand on ZXC, but V's a bit awkward and H is nigh impossible). The character itself, however, controls really nicely. Moving and jumping around feels good, and I really like the dash.
I found the artstyle really incohesive. A lot of the UI was hard to read because of stretched text or poor contrast, and the inconsistent pixel sizes harmed the games appearance. However, there are a few sprites that I like. The player sprite is charming, the checkpoint sprite is fun, and the hotdog enemy has some pretty good animation. Even so, future projects could definitely do with more thought put into readable, cohesive art.
My single biggest wish for this game, though, is that attacking enemies felt more satisfying. The current melee animation is really long, way longer than an actual knife slash would be. I also found it odd that you couldn't slash while dashing. It would have added a lot more to the (already quite great) movement if you could, say, cancel a dash into a slash, letting you end your dashes early for more precise platforming. Knockback when you hit enemies would also be a great addition. Without it, spacing attacks is really awkward, and fending off those flying enemies is a massive pain.
It's a shame that fighting isn't as juicy, because fighting enemies makes the game so much more fun. After a few runs, I realized that enemies dropped cheese and that the checkpoints can heal you infinitely, so I used a strategy where I'd kill enemies to stockpile cheese for the boss fight and use checkpoints to heal instead of expending cheese. This strategy is a lot more engaging than just speeding through, and it'd be encouraged if fighting was intrinsically satisfying. (Also, speaking of the boss fight, the camera seems to be bugged when you fight it the second time.)
But overall, the core gameplay and platformer feel is pretty solid. I looked at this game and expected to play it for 5 minutes and then rate, but I was going back at this one for a good while.