I really have to work on my Kanji, and after searching for a kanji game for months... I have finally have found the perfect learning game (IMO); Zaidan Houjin Nippon Kanji Nouryoku Kentei Kyoukai Koushiki Soft.

You will start from level 10, which is basic kanji (so basic, that I had forgotten a lot of them) and you can do tests from 10, 20 or 40 minutes. I think that if I will practice this game everyday for about 20 minutes, I should be able to increase my kanji knowledge a lot before July. (here is a full review of the game)
My Japanese teacher (sensei) also made a schedule for me, what to work on and how.
今から本当に頑張ろう!!!
p.s. what reminds me... It would be nice to do the JTEST as well in may... for a level check. Boukje? are you in? can you bring me a pamphlet from school for me? :D