There is some clipping in the right channel on the low piano it sounds like
The ooh samples I'm not sure if I'm a huge fan of the exact same articulation repeating. Is there not a way to change where succeeding notes start on the sample?
I feel like this piece gets pretty muddy in the low mids, and there is some clipping occasionally. Sounds as if mixed too loudly prior to export/mastering
Your vocal lines could use more breath support, as well as pitch control. If you struggle to sing but still want your melodic ideas represented, using autotune is not illegal. Better that than the sharp/flat on "die" at the very end. Without breath support, you can get that nasal kermit sound, as well. Recommend the singing course work of Ken Tamplin for getting started. It's great for beginners and professionals alike.