Tried the web version (not sure if the download version is different/updated), and it's pretty solid, though I'm not sure if the gameplay can be expanded much further than what's already here.
As for feedback, my only real issues are 1) the "Don't Move" segments last too long and kinda kill the pace, which becomes especially tiring on ???-mode, and 2) I'd appreciate a short grace period at the start of the opponents' special moves where pounding the table still makes him eat what's in front of him; it was really annoying to have him start making all the food rotten as soon as I tried to make him eat a preexisting rotten food and end up wasting that two stamina. Maybe also have the lights go off as soon as the "Don't Move" text appears (instead of only when you're supposed to stop moving) since that mechanic caught me off guard the first time, and having the more drastic change happen sooner would be a better warning for new players.
Lastly, if you do plan on expanding this into a full game, I suggest getting rid of the healing mechanic: me healing myself meant I never had to worry about losing, and the enemy healing itself just dragged the fight out longer until I finally broke our stalemate and won.