You might not know the game the Tickler so i'll just get you up to speed. You're a robot that breaks out of a mad scientist's lab and starts killing everything. So here are some tips on how to dominate!!
1.Lightning I recommend you buy lightning so that when you grab some body it provides a faster kill.
2.Speed You may not think speed is important but TRUST ME it is when you get into those bigger, tougher levels with shooters and other tough, advanced enemies.
3.Enemies Go after the stronger enemies first so then you won't have to worry about them and then you can kill all of the little enemies.
4.Enemy Transporters As you get REALLY far in the game you eventually cross paths with these car-like things that, if you don't kill them, provide more, and more enemies for you so KILL THEM FIRST!!!!
5.Aliens These enemies you only encounter in the last levels so this is just a tip for the masters at this game. When you encounter aliens go for their heads that way you kill them instantly but if attack their body it takes, much, much longer to kill them.
6.Beating the game This isn't necessarily a tip but more of a goal. If you finally beat the game on easy try to beat it on hard for a mind-blowing experience. Also if you beat that i am amazed by your skill.
Well those are the the tips I have. I hope they help with your gaming experience!