Ok, so I took a look at your project. You have one tilesource with a background image that is waaaaay to large:
The size of 4992x3648 will result in a texture that is 8192x4096 pixels, which equals 134Mb of memory (excluding mipmaps). You need to reduce this texture in size quite a bit. Your game.project specifies a screen size of 640x1136 so you should aim for a size closer to the screen dimensions.
If you take a look at the build report (which you get from checking the Generate build report checkbox:
You see that almost the entire bundle consists of this single texture. Nothing else comes close:
You should also consider using a texture profile to apply texture compression to your images to further reduce bundle and runtime memory requirements. Read more about this here: Texture Management in Defold