When I come around and give a try to arcade games (or more often arcade-feeling indie games), I usually think "hm, it would do good on calcs". I see I'm not the only one, and VVVVVV does the job really well.
So for those who don't know VVVVVV, it's basically a platformer game where you are a spaceship crew member searching for his fellows after an accident happened on-board. Obviously, since the calculator clone is not finished, there's no backstory (yet ?).
Gameplay : 9/10 - very much like the original game, with the same little annoying fact that fast-changing screens can make people dizzy.
Durability : 10/10 - I can't get enough of wandering around the huge map, trying to get past all the obstacles. Moreover, the map editor (made by me :P) lets you create your own world to play with.
Ease of use : 8/10 - in my opinion, the difficulty is a bit overkill sometimes - but that obviously adds to the game. The controls are intuitive, and that's a good thing when you need to react fast.
Graphics : 10/10 - seemingly simple, actually complicated, either way efficient.
Overall : 37/40 - great game and although it's still unfinished, be sure to get your copy and give it a try if you dare. The fact that it's still a work-in-progress can only announce an even better game.