speaking of which

I think it would look better with the old smile.

This looks really good. At this point we're just nitpicking at a concept, but I feel the feet could be longer.
EDIT: I would love to see some more concepts of player customisation that isn't ripped from Blockland. Maybe some hair? More torso/leg shapes?
Alright then, I tried out some examples of character customization.

The game could allow the players to use a wide range of accessories
I really like these models, but again, I feel this playermodel would fit better in a different game. I get unturned and paint the town red vibes from these. (pttr probably comes from the afro dude lol)
EDIT: Also, I hate to be rude about this, but I feel that you should have developed this game further before revealing it. I'm worried this is going to die or end up being disappointing. :/
I really hope you succeed with creating this "blockland successor" game. There are so few games that allow for the level of creativity Blockland or even ROBLOX allows.