A couple of things:
1. The berry room door doesn't work, and soft locks the player. (Might be just unfinished, but thought worth mentioning)
2. The pipe in the candy garden traps you in the main hall's walls.
3. Gally is really fragile to the cupcakes. She dies in one sprinkle attack, even when starting at full hp.
4. In the tasting room, the door way by the scientist acts like a water tile. The back stairway leading to the area also doesn't let you go back up.
5. Boss annihilator only does about ~400 damage, and disappears after one use.
6. In the quick start options in the new game room, selecting 'Isabella at the factory' teleports you to the candy garden, Isabella is not present. (Also unfinished content?)