Nice game here!
I really enjoyed the builds of your game, as I think they are simple and fit your game.
Now for the suggestions:
1: The detonator didn’t work when clicking on the button, at the TNT, and just wherever I try to click using the detonator nothing detonates. Is this a bug?
2: I was a little confused why I couldn’t walk when I first joined, just to realize that the game was still loading. I recommend making the players see the loading screen, and if they want they can then disable/untoggle it.
3.There wasn’t any tutorial or instruction at the beginning. If this was a new player, they would be somewhat confused at what to do. Even if you mention that in the game Desc, not everyone reads a game Desc before playing a game.
4. The inventory looks too simple, as I see it’s the default one. Change the inventory for it to fit your game. You should also replace the item names with icons. (Instead of putting the name Dynamite for one of your tools, replace it with a dynamite icon)
5. Is there a shop to sell all your items and buy new ones? Is there a settings button where players can adjust according to their needs?
6. The UI looks too plain. Try adding a border, adjust fonts, etc. Also configure your UI so it actually fits on all devices. The UI looked a little weird and messed up on my phone.(They were overlapping.)
And of course there are many other things you could do to improve your game, but for now these are what I have to give you.
Good luck developing!