Ninja Revenge

There are who insist that ninjas are everywhere, they may be behind you right now, lurking in the shadows and stalking you awaiting the precise moment to attack. However, this game is about the other aspect of ninja way of life: sharpen your ninja sword, break on through under the moonlight and kill ev-ery-one in close quarters combat. Where's written that ninjas hide? You'd better burn that book to ashes.

In fact, this game is a 2D arcade ever-runner sidescroller, not as histrionic and fast-paced as others, but likewise limited to jump (and double jump, ninja-style) and slash. As usual, enemies give coins away to be spend on power-ups. Some enemies bright in red, meaning that they are invulnerable and they will empty your lifebar with just one hit.

It's free, ads displayed while loading and at the bottom of the screen. For the record: there's a storyline about main character's wife being murdered, hence ninja vengeance and so.