Honestly, I didn't even know dynamite worked like that. That could be a good hint.
With the quests, I feel it is more a question of "does this quest fit this specific level," rather then "is this quest boring." That said, I did like the switching walls level. Also, I find the quests which just make the level harder rather then rework it and make it harder boring. That is, the speedrun and fast obstacles quests. Buffing the enemies is fine, because that changes how I approach the level.
An invincible enemies quest could be fun. Apart from that, no ideas.
I really (really) want a boss fight, but I don't think that fits with this game's vibes. Instead, a chase sequence with a hoard of bats might be fun. A rough idea is below.
