If you make a future sequel as hinted, I suggest as a consideration for rerollable quests, for another preset with the same reward value.
A particular quest, kill 4 trolls in 1 run is barely possible to complete because ive only seen the enemy type spawn between 1-5 trolls from ~L20 to ~L130, it's clogging my questboard :p
(before enemies start semi randomly despawning around that point unless you're at the very bottom of the screen (sometimes). :p surely an unintentional bug for a version)
2-4 trolls typically spawn per run, half of them being hardly accessible on short platforms annexed to the wall, out of striking distance and spawning on adjacent levels.
If there were a jump it'd be a lot more possible (btw love the comeback you made as to why there is none ;p)
I've read the other comments and I agree with most of them on what you've done well, especially the coins :) I'm considering downloading the Android full version. (Mobile global scores submitting is indeed being finicky :P)
Sorry for the text wall, well done sir going by the alias Blit-Blat ♡
Edit: the enemy type was actually orcs 😅