I like the concept of the game, cool 3D graphics for a one week development time. The effects are perfect!
The jumps are a bit too hard for me, I did not even come to the last symbol at my 10th try before I gave up (not even passed the tutorial level, if this has been one), I have read that you have planned to introduce more checkpoints which will be very good :-). The Isometric camera looks great, but I always tried to use both direction keys to move diagonal all the time, it is a bit confusing to see the character move diagonal when you press the D button, but in a bit of time you get used to it. My suggestion is to introduce the player to the game a bit smoother, definitely reduce the jump difficulty a bit, it is so frustrating when you have passed the third symbol and for the hard jump mechanism you have to start again at the beginning.
I think it has potential, especially the symbol thing with the different spells. Good Job!