Yeah Unreal really hurts us on the file size huh :D ... I have managed to optimize an empty level in 4.27 down to 140mb in the past but no time here and doing that would remove almost all the good rendering features that Unreal has so I would think 400mb would be the bare minimum I would want to do for a mobile game. Unreal 5.3 just does not cater for those nice 40mb sizes you can get with Unity. As for the assets, the platform rock, mountains, spikes, bomb barrells were made in a few hours and I think most of the other content was modified from imported content for the most part. I did the FireFX in embergen in like 20 minutes, the sound was imported. So it's a mishmash of custom built stuff and imports. I do not know what my partner built from scratch as he did the character but I would guess the water splash was something he built quickly as he knows niagara to a pretty high level and he added the toon shader post process effect which helped a lot with the art style. As for "one note" yeah 100%, we would have added more variety given more time but an hour a 2 a day is all I had, same as many others here no doubt. It's just a silly idea with an excuse to practice and learn some new stuff. My kids enjoy playing it so i'm happy with the result :D