a1.1 - Added superflat. Still playable here.
a1.2 - Added survival. Still playable here.
a1.21 - Fixed lag caused by void. Still playable here.
a1.3 prerelease 3 - Added sheep. Ride them off to the sunset! Still playable here.
a1.3 - Read the version's GitHub description. Still playable here.
a1.4 - Nether. Testing mode. Enjoy. Still playable here.
4d_aprilfools - Funny enough, I was 1 month late to the April Fools party. This could become an actual feature. Still playable here.