Great!
A tip: This game is not HARD at all, but CHALLENGING. The difference between the two is if something is HARD, it's not do-able at all for some people. But it's just challenging. Everyone can do it, if they're not epileptic, visually impaired, or handicapped. It just takes some practice. One you manage to keep the ball perfectly steady, (practice in lv01, the level is specifically made for that.) you do that by very briefly and quickly in a row tapping up. When you're steady, add as many left or right movement to the ball as you feel comfortable with. Keep the ball steady at all times. When you want to go down, tap up more slowly and when you need to go up, hold the up button longer at every tap. Just add a little left and right movement at a time, but if you add too few you have to spend more time trying to keep the ball perfectly steady between a dangerously narrow passage, and if you add too much left/right movement you won't be able to keep up! Just experiment in the levels to see what's the easiest way. If you're a little more skilled you can try to rush through the levels without keeping the ball steady to save time.
*Level guides based on block color*
Level Blue, Green and Yellow require no extra explanation: just keep the ball steady as listed before!
Level Orange shakes a bit: Just pay close attention to the gap that you need to pass and stay outside of the vibrating areas: they count as blocks too!
Level Red is just about the same but shakes twice as much (Quake width is half a block: imagine every block to be 150% it's normal size. and requires more practice.
Level White is just a tad bit harder than Level Blue/Green: anyone can remember the placement of the blocks as long as you pay attention, because they reappear briefly every second!
That's all you need to know.
Now for the actual review.
Quite a nice basic game: I'd consider this a classic! Nothing bad to say about the game. It's an awesome game for its kind, not a single bug or glitch, (almost) no lag. The reason why I didn't ten it because it has no background, basic design and no dying noise. But no game is perfect: keep it up and I hope you'll improve more and more: Deserve your ten!