Hey everyone - sharing some useful information about the game:
The final level (Channel 10) is unwinnable as of now due to a last minute bug before submission causing some unintended behaviour in the last echo.

All other levels (1-9) are winnable and have been verified.
Levels 8 and 9 have intentionally been made to be challenging and require precise timing. I have attached the link to the gameplay clearing those levels - for anyone who might be interested or looking for the solution!
Level 8 solution - here
Level 9 solution - here

Thanks for playing, and sorry for the rough landing on the last level.