Enable Saves
The Intro Of This Game Reminds Me Of What Is Going On In America Today With The Consitution ( Book Of Pixel Integrity ) And How Its Being Attacked Non Stop By Opposing Forces.
Pros:
Controls Are Easy To Use And You Don't Have To Spend 15 Minutes In A Tutorial To Learn How To Play The Game.
Lots Of Enemies, Upgrades And Medals.
Steady Level Progression ( Doesn't Go From Easy To Insanely Hard In A Matter Of Minutes )
Cons:
There Are No Save Points.
Makes You Start From Scratch When You Die.
Suggestions:
Break The Game Down Into Levels That Can Be Repeated So You're Allowed To Work On Upgrades Before Moving On To The Next Difficulty Or Wave.
To Make Things Interesting, Why Not Throw A Story Inbetween Levels. Oh And Don't Forget About The Option To Save.