Heaps.io

starting to see a lot of game engines popping up here and there, some are open source and some are paid license, it's good to have the option. if you are considering making a 2d/3d platformer then maybe give heaps a bit of a look.

Heaps.io is a mature cross platform graphics engine designed for high performance games.It is designed to leverage modern GPUs that are commonly available on both desktop and mobile devices.