When I started the game it was satisfying, but you really need to make more options for the welders, skins, and colors. Also there is a big after level 21: when you try to do 22, your welder does not show up and you can’t weld.
Maybe add a custom color maker, but the player has to use some in game currency to make a new color.
And lastly, maybe add more levels and if you want, special levels that unlock as you play that are more hard, but have greater rewards! Thanks for your time!