I'll be using this animation in my FOSS game engine, credit to you will be given (like the other assets present), but you don't specify any license your work falls under.
If possible, please take a loot at something like Creative Commons licenses or even something like the WTFPL, they are very basic and simple to understand, but it makes clear your intended use of the work.
If you want to take a look at my project, you can find it here: https://notabug.org/TooOld2Rock-nRoll/ArcadeFighterDemo
Your animation will be present in some commit in the near future.
Thanks o/