1. Hand to hand
2. enemy hp
3. clear points system (maybe a points indicator during every mission in, let's say upper-right corner)
4. achievements panel (how many points do you need to promote, what to do to get a ribbon,stats etc.
5. Transparency of trees, bunkers etc. - some times i don't know where me troops are hidden.
6. GREAT IDEA!!!
It's still more the concept then a real game but the climate and graphic rule. try ading some differences in levels and tactics, some buildings maybe. 3/5 at the moment