Oh, that was a bit confusing. Maybe make the upper left dot in the "u" an arrow instead? So it's a bit more obvious, you know.
Edit: I still need to know how to destroy those inverted cross crystals, too...
Ooh, that could work! I may have made the game a bit too esoteric ;>.> If you want to get through the crystals, take a look at the room with the roman numerals and the inverted cross. I intended you to need walljump for it, but I think there's a way you can do it without as well.
Edit: For the double jump puzzle, you can also follows the arrows on the stones. There are some in the lava rooms that are melted (in an attempt to obscure which way the arrows pointed), but the implementation is subtle... It's hard to judge what's obvious or not when you're the one building the game.
The room with the plant NPC, that has a big column through the center. The one above the starting room. I also had the series of transitions wrong in my hint doc, so double check that. I had one extra down and right, I believe.
I also think I'm gonna just... include the dev map in the solution doc XD
Edit: Dev Map added!!! For you visual learners out there. Plus it's cool to share some of the stuff that went into making the game :3