Normal mode was so boring I deleted the level. After getting the High Jump, I just kept wandering around empty screens, SLOWLY, until finally finding the Eye. Then I realized I had to go all the way back. I would have appreciated more saves and/or the Run module. I wouldn't say it was challenging at all, but definitely unfair and unforgiving. Several times I would miss an off-screen platform jump, then be reset 4-5 screens and have to slowly mosey back to the part I died on, only now knowing where to jump.
I've reinstalled it, and I'm playing it on Very Hard and I'm about to cheat and give myself the Run module. I'll let you know what I think after that.