Great game until...

Great gameplay, even paid for second invasion to get all 100 levels, but then youre done. You cant go back and play prior levels unless you reset the game, which Ive learned from reviews takes away all the upgrades (earned and purchased). There is a second gameplay type of endless waves, but its the same few waves repeated with increased difficulty. Just no fun after you beat all the levels. I would not recommend spending money on upgrades unless you get stuck. Hopefully, theyll update to where you can replay levels without losing all that youve worked for.

Racing Guy 234 about Space Cadet Defender HD: Invaders, v1.6