At least in the Android version, the boss fight at the Red Stone is bugged.
The enemy's fight animation plays in a loop even before the fight, which is confusing at least at the beginning of the fight, because it creates an extra bullet hell, some of which is phantom, since it apparently does not cause damage, but at the same time it makes it difficult to determine which attack is dangerous.
Also, is it possible to add a default gallery to the Android version? Since you can't add mods to the Android app manually.