Here is a game I am currently working on. It's basically what the title already states, you play a ninja and can create your own ninja weapon and ability deck to kill the enemy. It's either playable 2 player-on one devide or one player against the AI.
A skillset is made out of 3 skills (currently 9 skills are available), each having a completely different behavior. (strong/slow/high cost, fast/spammable, stun, damage over time, delayed shot etc)
Hitting a skill will charge your dodge bar, making you able to avoid hits when used correctly.
The game is completely free and I am planning on adding a solo arcade mode soon.