Help with 2d pixel-animated explosions

koalefant

Hello,

I am working on a little turn based game and struggling to make some clean and fitting explosions.

Would you have some advice for me on how could I improve this? Or maybe you could point me some tutorial with a nice technique?

Here is what I have now:

Here is the playable game prototype if you need more context: http://mandarincake.com/tbs