So, one of us had this subject in school that was about making video games. The framework we used was XNA, and though the games I did were not something to brag about, for starters, I guess they were not bad at all. I used sprites from many sources except in the last one where I drew most of what I used including characters, backgrounds and animation as a whole using spine. Here are the 3 video games we developed. I really hope you enjoy watching them!
Dragon Ball Runner:
Platformer (Never picked a name for it XD)
Here is where draws are mine (Simple yet mine), and animations are also ours. Animations were made with SPINE which is an awesome software developed by: http://esotericsoftware.com/. If you're working on games, please consider them to create your animations as their software is easy to use and simply Awesome!