If by “not doing so well” you mean it doesn’t have many ratings, the fact that it’s not playable in the browser is a key part.
Indeed, if you look at submissions in need of rating, you will notice that they don’t have a web export or that their web export isn’t working.
This is due to the fact that playing directly in the browser is easier. People often don’t bother downloading anything, especially an executable that could contain malicious code.