Thanks all for the bug reports. I'll do my absolute best to fix them (not 100% about the level 2 aquamentus thing) and I really don't know how to fix the Pegaus Boots chipping away at those two blocks in that room.
@Spelunker:
I think I know what the issue is. In B1F (the biggest floor where you fought Blue Aquamentus) go on the right side to the room where there is a bomb wall that you can't break. Notice that the two green statues are looking across the room. Simply blow up the wall on the other side and it will allow you solve a pretty simple color block puzzle that lowers the red tiles on that floor, freeing the bubble.
@Neobullseye:
About ice dungeons, there isn't really too many spots you'll see ice. There is some ice in another dungeon, but you'll have an incredible advantage to the effect that it is not really a bother.
@Joki:
The White Sword is located in Dungeon of Trials #1. It is located where Level 3 was in past time.
Level 3's boss wasn't intended to be too hard. He has some randomness until he falls and becomes vulnerable, but I tend to lay fires for him to land on so he gets hit for that temporary frame I can't move. I normally don't slash at the spinning tiles either unless I have some distance or need magic (which I normally don't).