Now you can now play the original Minecraft Classic game through your web browser. Building, crafting, and adventuring doesn't get much better than in Minecraft Classic.
To start with, you only have 32 blocks so your building capacities will be limited. And there are no enemies in this version. However, there is no way to save what you have built in the browser mode.
WASD to move
Left click to destroy/place a block
Right click to toggle build mode
Number keys to choose a block
Enter to save the position
R to load the position
B to open blocks menu
T to chat
F to toggle fog