I’m honestly struggling to have fun with this game.
re the backwards hitbox issue - assuming you genuinely couldn’t get it in the right position, surely a better solution might have been to commit to the bit and have the fish itself swim around backwards? Also, re the level issue - perhaps you could have marked the starting area as level 1 (instead of leaving it unlabelled) so players would actually know that level 1 is actually level 2?
Aside from that, it’s still not entirely clear what the fish is meant to be doing within the levels. Sure, press spacebar to eat and all that, but, even when accounting for the dodgy hitbox, anything that seems eatable (such as those other fish) just end up outdamaging and killing the player fish, not even giving the player fish a chance in the fight (thereby telling the player ‘you should avoid combat, as you will lose’) - so I have no idea how the player is supposed to be able to win a fight against that lobster (which I’m guessing is meant to be the boss of that level?)
And, regarding those upgrades - how is a player meant to unlock them anyway? I’m guessing they’re needed to get those golden worms in the actual first level, but there’s no clear indication of what needs to be done to get them.
Overall, this game just feels… bad. not in a good way, just in a very uninteresting way.