Very hard game lol!
I like the safe zone idea but the enemy was able to get into the safe zone and kill me.
You should always be a little bit more forgiving when it comes to the colliders, most colliders should be alot smaller than the character cause it feels more fair.
As for the art, avoid upscaling art assets and always keep the pixelart size the same, this makes the game look much more consistent, the sprites themselves do look consistent but once again, resizing and upscaling pixelart makes it lose the consistency.
There should also be some kind of walking sound to make the game a bit more immersive.
There is also a little delay on the walking? In unity you probably put your input detection in the FixedUpdate or put the movement phsyics code in the Update, always put Input in Update and moving logic in FixedUpdate.
Pretty cool jam game, good luck on your future games!
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