It was like...Metal Slug but really Superman.
Here is my feedback.
1)I played the first 3 levels dodging bullets like a maniac (metal slug pro)
After that i realised that when many bullets hit me,my life was still very high.I was like superman man,at bosses i just stood there and shoot...no need of dodging.
Here is my tip:Instead of energy bar,replace it with replenishable health bar and lower the HP of the character...this will keep people from dodging.
2)Give more weapons,add more strenth to them.I was WTF between of taking the rifle or add a member.So i added a member.I started shooting and shooting the countless soldiers appearing from everywhere and got tired of pressing the mouse.I though that upon taking the rifle i would be good.The friendly units were'nt much of help.I regreted that i took a member.
Tip:Strenthen the weapons or lower Hp of enemies,also if want add more spawning rate.
The rest of my review is answered by utucuro some reviews below me.
Music was ok.
Animation was beautiful.