Nice platformer! Vesuvius kind of looks like Core from Celeste, and Deiry kind of looks like Ori, and I like it! I appreciate that you took the time to make a tight-to-control character too - a lot of jam games don't put enough time into it. Just a few things...
- Very small gripe, but Pompeii's citizens don't have the same pixels per unit as everything else (Everything else is fine though)
- The background felt incredibly bland during the tutorial compared to the rest of the game...
- Cheese string felt incredibly unresponsive compared to everything else - the string itself should probably extend faster, and you should probably be able to cancel it with a jump as soon as it reaches the wall.
- It was kind of annoying having to cheese string after every LPA. (By the way, you should have used them more - they would be so cool if they were a little faster)
- Before I realized you could reset the scene with R, I got softlocked out of the tutorial for double-jumping too much :-/
- THOSE CYCLES ARE SOOOO TIGHT! Especially this room below, which took me forever. (I've made a stupidly hard platforming game for a jam too, I understand the feeling of wanting to make things just a little tighter... but you could have nerfed that second lava rise in that room by half a second or so...)
Overall, a really enjoyable entry that I had a lot of fun with!