Here are all the references:
1. Beat 2 was the Evil Leafy Face from BFDI.
2. Voice 4 had the Normal Polo mouth.
3. Extra 2 was inspired by the sounds from Mario.
4. Extra 5 was from the game Among Us.
5. Extra 8 was probably from the Game Animal Hospital Anomaly.
6. Extra 9 was inspired by the soundfont from Baldi's Basics.
7. Extra 10 was inspired by Bendy and the Ink Machine.
8. Beat 1 was inspired by the Basketball Oren from Sprunkocaine.
9. Beat 4 was inspired by Brudy from Melokitties.