I unironically found a few glitches;
1. The Lagomorph just gives you the pendant even if you lose, if you at least have 1 Speed Upgrade, or alternatively you cast magic on a Blue Caterpillar but don't take their upgrade, then leave the area she was in so to despawn the Upgrade, which apparently makes the game confused into thinking you got it, this helped with my Low% (yes, serious).
2. Despawned Upgrades still have their hitboxes when you come back, that is if you didn't took them in their visible form to begin with.
3. If you open the final door with an incapacitated enemy right by it, you trigger both animations (the door opening and getting the enemy's ingredient), which leads to you cloning the heroine.
4. I actually got defeated by the final boss (due to lasers with way too big hitboxes from what they appear), but I still defeated her, meaning the game played the game over music, but I still saw the ending.
I actually replayed the game enough to figure all that out, go figure. Heck, if you don't know, shoot your magic to the top of the screen, and it'll come back down, meaning I could do trickshots as well. Again, I found all this amusing.