I have to reduce size of playable file... Can you please tell me which files are unnecessary in luna playable build file which I can del for reducing its size

Currently Playable build size is 3.58 MB and I have to reduce it below 2 MB.

Luna has a built in Size Breakdown section which I have found real useful when trying to reduce size.

Documentation Here

I have found images and sounds are are often a cause for a bloated playable so if you have unused assets I would make sure to exclude them.