Gameplay is simple enough to pick up, but tricky to master; the correct approach to the various puzzles is unclear more often than not. Also, some of the levels seem right on impossible at first look, and this just exacerbates one of my biggest gripes with the game: not completing a level in time. If you fail to complete a level you’ve been staring at within the allowed time limit, you lose a life.
The short time limit, however, does add an interesting element of pressure which is undoubtedly essential for a game such as this; to be blunt, without the time limit, this game mechanic would be hugely boring after completing a handful of grids, but the tension caused by the ever ticking clock you have to race against lifts the whole concept out of the realms of tedium.
Overall, this is a commendable effort from an independent developer. There will be plenty of people out there who do like the challenge it offers.