Thanks for the comments, everyone.
@proYorp: It's good that you noticed that mirror thing in levels 3 and 4. I made a custom program that flipped the level data (and changed tiles where necessary, like ceilings to floors), so I kept designing one level and beta testing two. (The second halves of those level are completely different, needless to say.) I too like the ambience in the fifth level, the beginning, I'm glad how it turned out.
@Roobar: I think those arrow tiles imply well what they mean, that where the arrow is pointing that edge is blocked. You see both tiles right in the first level and their functionality becomes clear there (or should). I wanted to make Keen sort of alien-like. Not a mask. Can't say there was anything rational behind that decision, simply a random idea. Also, I thought the player would remember the take-away coffees (they're the first collectiable in the game) and not mistake for platforms.

Thanks for playing the levels, too bad you feel they were 'pure keenrush insanity' because my goal was the opposite. I still can't decide if people just aren't good enough players or if these levels are too difficult despite everything.
@Ceilick: It's good to see that you feel what I intended, that the levels aren't too difficult, that dying happens because the player is not careful enough, no special skills needed.
@gerstrong: Feel free to add it to CG. Thanks for playing.
@XrackProject: Thanks a lot for the video-playing. It's both interesting and useful for me to see these, plus it gives the mod a lot more visibility when there are videos. While I don't understand much German, I understand some and liked listening to it (and your reactions were amusing).
