There seems to be a minor glitch: When using magic while there's an assassin on the screen, the assassin's health bar suddenly becomes about triple in length.
I also encountered a unit now and then (after level 20) that would appear out of the upper left-hand corner walking very slowly and changing rapidly between all of the walking unit avatars.
I would suggest adding a crate limit per level to make it a bit more challenging. Nothing too unrealistic, mind you, just enough so you can't get away with filling the level with crates to win.
I very rarely have issues with game play on this site, but this one game (for some reason) likes to mess with me. It's VERY delayed for some reason. There's no lag with balloons passing, but if I click "road spikes", for instance, I want them to appear WHEN I click them, not 2 minutes later. Perhaps it's just my computer... but it pays everything else just fine. Is anyone else running into similar situations?
That aside, it's rather enjoyable.
Nevermind... I just got 11/10 on 15. Wait until the box JUST hits the top of the first green guy, then click your yellow "pull them towards me" meebling and you should pull them all towards you and pull the box to the ground, where it will release the rest of them. It's all in timing, try it a couple times.
I've been stuck on lvl 2 for a half hour... =/ Awesome game regardless. Make a #2 where it's slightly easier... and maybe there are power ups... like one can slow down time and one can stop the obstacles from rotating or something. Anyone with me?
Definitely needs some work. Has potential. Even just cleaning it up a little would help. For example, the weapon/tower icons are covering the description and price. Also, It seemed like I was on a menu page for a brief moment, It had a tutorial button, explained some of the game's features, etc- but before I could click anything, It cast me right into the game. My best suggestion would be, take in suggestions from these comments, think about them, see what you can do. Obviously you can't please everyone, but I'm sure you can weed out the important fixes. 2/5 for now.
I'd recommend adding some upgrades or some little extras while flying through the air. Just something extra. It's almost there, but it's kind of plain.