Voxel
It doesn't have to be just rectangles though, it can be diagonals, quarter circles, corners only... I want it to be super flexible and yet mesmerizing at the same time.
My plan is that each cell can communicate with its neighboring cells to determine which transition it will play and at what time. If I get far enough, I'd also want there to be multi-cell transitions, where the cells can temporarily merge and have its own animation for a few phases
Teeworlds might be able to use meshes as a way to animate, but the way the animation side of the editor stands, it won't cut it. With an external editor like Teeditor on Google Store or TeeUniverse, It might be achievable.