no progress after exit back to level 1. STUPID!

...u recognize there is no limit for the unlimited !!!

So I've gotten to level 11 of 13 (apparently the reviews mentioning only 5 missed the boxes in the bottom right corner that go between pages of levels) but I'm...stuck. It's a dark level with no enemies or traps so it's a easy run between the chest, crystal, and exit but it doesn't unlock level 12? Any way to get to level 12 and 13 to finish this thing? Side notes - the Cyclops boss was a pain in the ass to beat. Also, I found it amusing you get the 'achievements' without notifications too. With a b...

Just ask :)

please