Minecraft wiki entry for Classic_0.0.23a_01_(remake), associated text: Graphics
Lighting is very different compared to the original, appearing more flat.
Oddly, blocks appear to have a slight shine when looking down at them.
The remake used the Noa Engine.
Anti-aliasing, making blocks look more smooth.
Block textures are stored separately rather than on a terrain.png file.
There are many filename oddities, for example Iron Ore is internally called "bronze rock".
Inventory/hotbar block previews are pre-rendered textures unlike the original.
Because of this, they appear pixelated at high resolutions.
Models are stored in the bottom corner of the world, underneath the bedrock layer.
Saplings do not show particles when broken.[verify]
Sound
Sounds are stored in .mp3 format rather than .ogg format.
Music can be enabled in settings.
Are the Volume Alpha soundtrack versions.[verify]
Many sound effects are missing.
There are no walking sound effects.
Breaking wool and glass uses the grass and stone sound effects respectively (The original used higher pitched versions of the grass and stone sound effects for those blocks.)
Breaking leaves plays a new sound that was not heard before in the original.
Multiplayer
There is a new menu when you start up the game, letting you choose a username, and gives you an invitation link to invite people to a server.
The invitation link also appears on the pause menu.
Other players take the same, glitched appearance as the human mobs.
The name tag above players is also more reminiscent of modern Minecraft rather than 0.0.23a.
The command set is highly limited compared to the original.
Consists of /list, /kick, /ban, /tp, /setspawn, and /help.
/ban is not mentioned in /help and yields a "Command disabled." message when attempting to use.
You can also use commands and chat in singleplayer, unlike the original version.