This game is:
25% agility
25% extremely tricky platforming mechanics
25% bouncy walls working against you and
25% lag
It might be a problem with my computer, or it might be because of the graphics effects, but the lag prevented me from beating level 11, because the two blocks from the roof hit my character in the head before it can fall all the way to below the four appearing blocks, and I trust that's because of the lag and not failure of level design because some reviewers here managed to beat the game through. I can even make it to the bottom in time sometimes but then the falling blocks just glitch through the newly appeared shelter. I concur with other reviewers in saying that there should be an option to toggle the really fast visual effects off, just to make sure as for what comes to me in particular.
I definitely felt like I was learning how to better and better control the character all over the course of the selection of levels, but I also felt like half of the times I died were because of lag. For sure I feel like I could be shifting the blame of a problem that could very well be my fault, but level 11 is absolutely unbeatable even after I had beaten all the levels before it with moderate to disruptive lag.
Something that I differ on with other reviewers is about that I actually think the platforming mechanics add to the game. They're something you have to figure out with trial and error, and that actually kept me hooked in addition to the intriguing intro and aesthetic that make you curious as to what they could ever hint of for later on.
You get four stars!