whether or not the game keeps you coming back until you complete it, and i doubt that is how you ranked it. if you played through the entire game you would also see that the levels are actually quite versatile, with expanding elements of gameplay. you must take what youve learned in earlier levels and apply it to new ones, in the end you must use everything you know to win. and the plotline may not be necessary, but it is sort of cute, and it does nothing to detract from the game so it should not lower any score you give it.
your review doesnt make much sense deathlich. a demand for high quality graphics in every game is ridiculous. sometimes simplicity is best, and can be quite charming. comparing this to epsilon is also rather laughable. they may be in the same puzzle/portal genre, but they are two very different games with different goals. you cant really compare the two. also epsilon was developed by a large company, while tapir managed to make an incredible game all on their own. and the way you rank replayability for a puzzle game isnt the same way you rank it for other games. you rank it according to