Its good, but there’s some things you could do to improve it. The background between transitions repeats the sun it would look better if you took the sun out of the other backgrounds. Also it would look better if you gave the player a walking, jumping, and placing/destroying blocks animation. Also the player being either alex or steve is fine but would be better if you gave the player a choice. I noticed that the water block when you try to place it is just the glass block besides all that good game!
The game is nice! Better than me by a lot. I agree with CHICKEN_MAST7ER though, it could use some animation. Also there is this constant noise in the game that sounds like a helicopter. Idk what that is, but its a bit loud. Otherwise, this is a neat game!