Under rating threshold (hideshow)
Some of the levels (2nd one usually) keep failing without me leaving the gray area at all, not sure if I'm doing it wrong or maybe it's my computer, but it doesn't always happen so I assumed it was a glitch.
Yup, I've had a lot of complaints about that, as you can see. I won't fix it though, as I'm not making a full version. I'm working on some quizzes instead.
Under rating threshold (hideshow)
Overall, pretty good. There are a few bugs, and this could get a little reptitive due to the lack of check points and how hard some of the levels are. Starting from level 1 when you almost did level 5 is a little harsh. Overall, 3/5.
I can definitely understand that it's pretty annoying if you die on, say, level 5 and you have to go all the way back to level 1. I'll be adding in shortcuts for definite.