This app was mentioned in 1 comment, with an average of 4.00 upvotes
For game developing Clojure + libGDX maybe a good choice.
AFAIK the game "Bounce Away" was developed with these tools.
I tested with my old Android Tablet and it seems to have a reasonable startup time.
https://play.google.com/store/apps/details?id=com.friendlyvillagers.ballz&hl=en