There's a minor bug with the upgrade screen- clicking on an upgrade you already have lets you continue to spend points on it.

This game is a lot of fun, although it is really difficult on some points. I tried Level 8 over a dozen times and I'm always unsuccessful. Maybe increase the attack power of the towers would help, as I'm sure I'm not the only one to have this problem. Either that, or the orange monsters have too much HP. Or you could also add an upgrade that adds Attack points to all towers.
I need to say this game is really great despite this problem. The idea isn't original at all, but who cares? The gameplay is still fun. The graphics are alright, the awards work differently from what we see in other such games (that said, some more awards that work more like achievements would be pretty cool). Despite the major problem, my gaming experience was fun and lasted quite a few hours (though more than half of them were with me trying to complete Level 8...)

One of the hardest tower defence games I have ever played.
Mainly becouse game allows me to build just a few towers. Seems that only way how to beat this is focus on one or two types of towers and upgrade them to max. Then it still isn't much easy and when I tried to build all towers it was practicaly impossible to win. Also towers allways shoots on first enemy in line even if he's temporaly immortal in the moment.
Graphic and music are nice, awards are just for killing xxx enemies etc which makes them not worthy for getting.

Well done. Nothing new, but enjoyable. By the way: Level 6 - a mistake? Looks like a famous symbol of WW2.

Well, it's not bad, but it's certainly nothing that hasn't been done a thousand times before. Graphics are quite nice, but the gameplay doesn't offer anything really special.