>>16601360
The alpha version of terraria barely had clouds, depending on the build. On more advanced ones, you had up to Skeletron, iirc. Yes, the builds are still circling around somewhere.
Things you would be missing on Terraria's alpha (depending on the build, and excluding post 1.1 features) and 1.0:
>sawmill
>lots of furniture
>no thrones, mugs, toilets, etc.
>jungle spores
>keys, shadow and golden chests
>the immortal dungeon enemies
>dungeon slimes
>dungeon guardian
>critical hits
>damage types
>potions
>king slime
>vanity items
>tim
>sticky bombs
However, you would have funny death messages that actively mock you and IIRC also call you an idiot, as well as the legendary Zapinator that dealt 50 damage per second, fired insanely fast and did not consume anything.