I need a side project, and wanted to try to develop a 2D side scroller platformer.
I was wondering if there are any free 2D sprite-based game builders out there preferably for multiplatforms. I'm even wondering if going the HTML5 route (I do have a lot of recent experience in HTML5) would be possible.
I'd like to focus on the 'art' aspect, but am not averse to programming. I just dont want to have to build an engine from scratch myself, this time.