Great!
Gameplay: I've noticed many people complaining about this lag jump concept, but it was implemented specifically to achieve 3 stars on some of the most difficult levels (I died a ridiculous 300 times on level 21 in one go just go get 2 seconds shaved off my time). I in fact liked this lag jump concept, as you actually had to time your jump instead of spamming it to get the maximum height.
And for those gamers who didn't notice, this lag jump concept allows you to have an extra "jump" whenever you fall off a ledge. Specifically in levels like 32, where you can rush forward, walk off the ledge, air jump to the platform, then double jump to the opposite ledge (to avoid the wasted 4 seconds for the platform), this concept has to be used. But I guess I was just patient enough to die so many times that I started noticing how to play this game properly.
Originality: Not very original, but due to so many games coming out at the moment with 'revolutionary' ideas (gravity, etc.) I felt this was actually refreshing and new in a weird sense.
Graphics: I loved the pixel graphics. Enough said.
Note: Tell me if you beat f*cking level 27 with three stars! I've beaten every single other level except this one. Stupid one hole low ceilings.. -_-
The only problem I had with this game, was that it didn't save your time (only stars), and there weren't enough levels!
Overall, Great game. Keep it up!