The GFX is definitely above passable, but my biggest critique is the text will probably appear too small to read because of the size of roblox game icons
the one thing I would say, is that the main character is too big.
the text covers their head, and the feet almost clip out.
I would recommend you make it slightly smaller to fit better.
also the stars might be a bit too blurred.
but other than that, awesome logo!
Edit:
“you know you are finished not once you have nothing left to add, but when you have nothing left to take a way”
You have a good eye for design, but I would suggest opting for something far simpler, such as simply the letters “PS” in the foreground and an object that represents your game lying in the background. This is because, especially for ROBLOX groups, logos like yours can become difficult to decipher the contents of. Remember, group icons are only 150 pixels wide on the group page and a mere 50 pixels wide on the group list. Try resizing your icon to be 50 pixels wide and see what I mean.
Just realised this is a game icon. In that case, your logo is passable, but some detail will be lost, such as the small faces on the lettering. Game icons are 150 pixels wide, but as can be shown below, a lot of detail can result in the background being cluttered and indecipherable. I’ve done you the favour of resizing it so you can get an impression of what it might look like. Beware however that it would probably look worse than this due to compression.