Happy Wheels is a bloody and exciting obstacle course. There are many unique characters in various levels. This is a great game for you to experience. 
There are also similar games
Are you a fan of Paper.io? A very intriguing and humorous story. 
The online game Paper IO 2 features colorful maps. Go to the area after picking a reasonable spot for yourself. Make a connection back to your color to affirm the area after moving over the space and area of another player. 
Take over as much of the area as you can while defeating your rivals.