Who would've thought a game without health could be so much fun?
Do not follow the Hints/tips.
Get Weapons in this order: Ricochet, Slow Time, Energy Homers, Laser Lock, Lightning, and Duck Death
The game play is excellent, music is good too.
The only concern is that dieing means nothing. At least have checkpoints that you go back to. I like a game because its fun and hard enough to pose a challenge.
Graphics: well done, Music: Excellent, Gameplay: good enough
Notes: I really liked the keep your score as you die, it rewarded our efforts which is necessary for any defense/rpg
The only improvement I can see is having a faster reload time for the catapult and faster troops, maybe an upgrade?
On the whole: very good.
I found a Glitch
If you buy anything called "undefined" you will get unlimited money and capacity.
There is a guide here:
http://www.kongregate.com/forums/3/topics/1328
Pros: Music Excellent, Gameplay Addicting, Graphics Well done.
Cons: First 9 bosses too easy
Extras: Good upgrade system.
Adrenaline nice feature.
Possible Improvements: have a way to increase health beyond just adrenaline.
Have a timer or distance counter for the boss.
Have waves of enemies or homing missiles that you can/must shoot down in the boss stages.