Woah Thank you ❤
Yeah the dash through lava is a feature (if I recall you can dash through 1 space easily and 2 if you time it perfectly).
In the initial release 10-6 was the last level, 6 month or so later I added world 11 which was previous level inverted. The difficulty curve could indeed be a bit better managed.
By the way, if you go in the stats screen and you tap several times on the first item, you get to see a break down of stats on each levels.
I'm glad you like 8Links as well =)
Cheers
Anton