Needs some work, but a decent start.
I really like the linear game play in which the units push towards the enemy and you just have to create the units and send them on their way. However, I wasn't a huge fan of the three track system in which you had to send units down one of the paths, it just slowed the game down a lot and required too much upkeep for no real reason. It was like playing three games in once, and I really didn't feel all that gun-hoe about finishing the second level because of the unfriendly interface. I'm normally a big advocate about simple is better when concerning the overall design of the game, so that was a plus, but I found that there was just a lot of things that could have been designed a little better.
The thing I found the most difficult was trying to attack, there wasn't a way to send multiple troops at once, I would always have to repeatedly click what unit to send, then decide which of the three paths they would travel. It became very repetitive and arduous, and was the main reason I stopped playing. I would have preferred to have bought one upgrade which would have sent a constant spawn of basis soldiers onto the battlefield rather than continuously having to send one at a time.
I also feel that more units are required because there just wasn't enough available for the number of levels on the map. I think with some work this could really be a fun game that everyone would enjoy, thanks for the work.