Lots of issues and I seriously think none of them will be addressed by the makers:
1) Based on the random spawing of things you can interact with you can sometimes run outta power before even encountering your first target.
2) The "coins" are worthless since the game doesn't save what you accumulated so you can actually buy upgrades (from other reviews this may be a new glitch?)
3)Unused coins are lost so each round I couldn't use a single coin to buy any upgrades, and so was essentially playing a lv 1 useless twat each round until bored.
4) And this is serious, I went to gamesfree via the link in the game. And my computer was promptly infected with a 3 blackhole viruses.
I'm almost thinking this is a front just so they can place software on everyone's compies for whatever purpose they have. Poor show chaps!