Before i get into my comment, i want to apologise for how mean im probably going to come off. Making *any* game is kinda difficult, and there are aspects on display in this game that are, in isolation, very good. That being said, I didnt have a very good time playing your game, and (having seen your post asking for advice on whether to continue development) i highly recommend you write up a post-mortem and never touch this game again. To be frank, this game just feels ametaurish.
but first, the positive - the music is the only part of this game i really, really enjoyed. If i was reviewing the OST on soundcloud, i'd be writing a glowing review. It's good. thats all i can say. im not a music critic. The writing was decent, generic fantasy-type stuff, but it didnt turn me off (which it absolutely could have, had it been bad) so thats a plus. You won quite a bit of goodwill through your whole introduction section, which is what kept me playing as long as i did.
The pixel art is lovely but inconsistent; the pixel size differs from the character to the ground to the lamps, every single element is sized inconsistently. I'm not a person who considers "mixels" a cardinal sin, but the way they've been used here certainly is - it looks like you've put the very basics of this game together with no care for aesthethics. The first screen alone has 3 different visual styles, and its as jarring as it gets. again, if i was reviewing an asset pack containing the sprites from in your game, i'd be writing a glowing review. but how you've put everything together is just tragic.
The gameplay feels,,, weird and clunky. I dont have more precise words to explain, sorry. The angry birds flinging mechanic is imprecise, lacking in depth, and just isnt very much fun, and i found myself wishing the game just had some kind of regular movement. Having to aim the opposite direction of your target to land the fireball attack also felt odd, i regularly found myself shooting it directly behind me. Every now and then, i'd just die for some reason? and the animation would be *very* long.
I eventually figured out that this happens after you shoot the fireball if you miss, and all i can say is, what a poorly thought out mechanic. This game has respawning enemies, and you have to kill them with a projectile attack, but if you miss you die yourself! it's unreasonably punishing and again, not very fun.
After the room with the doom-looking sigil, the camera softlocked - it would no longer follow the character across scene transitions. Here, i just decided to quit. It was that, or sit through the opening again for a game i already knew i disliked. Sure, maybe you pulled out all the stops for the next room and my opinion would 180, but we both know how unlikely that is.
Please, keep making games, and absolutely use the experience you gained working on this to make what you do in future. But for your own sake, dont keep making this game. If i had to give you a tip, i'd suggest you be slightly *less* original, not more.