Freshly released, is v6.10 of The Little Crane That Could for linux/64bit [update: and win64]. You can get it at bram.itch.io.
It comes with a tracked vehicle and a hill climbing level. You can see it in action on YouTube (although the game at 60fps looks much better than YouTube's 30fps can do it justice.
iOS and Android releases will follow soon. I was pleasantly surprised by iPhone5S which can easily do this simulation at 60fps. My iPad3 struggles to get 30fps though. I guess the iPad3 CPU is not all that great.