Without knowing your game in detail, it's difficult to recommend something and expect it to work.
But your problem may be that you are not optimizing your files.
For example, in a 2D game, you can have 20 animations for one character.
If you use one image per animation, there are 20 files.
If you use a spritesheet instead, you reduce from 20 to just 1 file.
This is a general suggestion.
If your game cannot be optimized further, then as it says @No Time To Play. You could make a smaller demo and make the full game downloadable only.