great weight with the little guys, and nice movement and the particles and auxiliary animation works well
the way you posted made it hard to do this edit because it wouldn't scale back very friendly, but here's an attempt, get in the habit of animating with timing (xxxms) most game engines can load the timing from gifs if you load it like that, constant frame rate animations is quite a hindrance when you try doing subtle and even snappy motions

took a frame out and added a bounce divided into two half speed frames