This game must be much more good if you put levels and power ups like shields or invisibility.
The only thing i do here is kill and buy stuff.
Nice Graphics, almost the best part of the game. there is not much to do but buy weapons and kill, you could of added things like team mates, or 2 player.
Wuld be better if..........
If you made like houses to buy and hide in while ur waiting for next wve instead of screen,like the shop could be avaidable evry time u complete wave and house to heal and save,and also Veichles like jetpack or jeep,etc.Good though!Oh and as u progress u get allies that help plaw green aliens oh ya Adventure mode.Good overall.....
would be better
as a defense game or maybe just a bigger zoom out
TOO MUCH BLOOD