What to say about Grey Cubes...

My overall positive impression stems partly from my childhood Arkanoid days, partly from the fresh approach to the genre and the very fair pricing at €1. I thoroughly enjoyed the first 12 levels as a nice passtime and skill-based challenge. Then the first invisible blocks (rotating around a visible one) entered the game.

While you can (quite rightfully) argue this is still skill-based, it starts to become a bit of a hassle and introduces some hectic elements into an otherwise enjoyable and relaxing experience so far. However, with some imagination and a good memory you can guess the remaining blocks. And you will learn to love the magnet feature that will home in on remaining blocks, visible or not.

Looking back, this was still an easy and enjoyable level. Heck, all the levels can be finished even by an old geezer as myself (it took me about 3 hours to finish all 60 levels). But the further you proceed, the more little annoyances and grievances start to surface.

My major complaints:
- Some obstacles are hard to make out in some areas (very light blue on light blue simply doesn't stand out visually and you may be surprised quite a few times when the ball suddenly bounces right back and out of bounds).
- Later on the tubes dropping cubes (cool idea, by the way) remain on the playing field for no other purpose than to block your sight, often blocking both ball and paddle if at an unconvenient angle, thus leaving you to guess whether you will make contact or not - especially if you have some cubes or obstacles in that area as well.
- The "whirlwind teleports", moving around at the most inconvenient times and patterns or being placed statically in positions that trigger a nigh endless loop.

There were some other minor annoyances, but all of that can be attributed to personal preference. I imagine some people don't mind some randomness or some "tough-luck" situations and see that as a way to increase difficulty in a game. I sometimes felt left to the will of the game (not quite often enough to make me quit, though) instead of failing because of slow reactions or making mental errors. Personally, I don't mind increased difficulty, but I do mind being helpless in a given situation.

As for the devs message at the end of the game, mentioning more levels to come... since I can't see any updates for this game since its release in 2015, I would take that with a pinch of salt.

Another thing that may annoy people: The achievements seem to be broken for many players, including myself. As of the time of this review, I didn't get any of the achievements (not even the one you should theoretically get for playing more than 5 minutes...).

With all this in mind, I would still recommend the game. It was mostly fun (induced with some short bursts of frustration) and for 99 cents you can hardly go wrong if you are looking for a little distraction. Just don't expect too much.