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.

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

BORRRRRRRRRRRRRRRRRRRRRRRRRRRRRRINNNN NNNNNNNGGGGGGGG

good game

good its kinda like the rage games i almost beat it but very good 10/5