Nuke Tower Defense

Hi
I was studing the use of the mouse in the engine and came up with this.
It’s a small prototype of a tower defense game.
http://img690.imageshack.us/img690/1146/ntdss1.th.jpghttp://img510.imageshack.us/img510/5810/ntdss2.th.jpg
3 stages with 6 waves each
Keys:
B - Building mode
T - Build Gun Tower
M - Build Missile Tower
N - Build Nuke (50)

U - Upgrade tower
N - Use nuke (if ready)

W, A, S, D - Scroll view

0 - toggle mouse scroll
9 - Show enemies HP

DL (212Kb)
http://www.4shared.com/file/ww50XgML/NTD.html
http://www.easy-share.com/1913370681/NTD.zip