Heya! Thank you so much for playing our game, yes we ran out of time to implement the sounds though we had a lot ready.
The powercubes should come out tho :(, have you tried the latest build? For the first level, you should only have around 2.
The first one is inside it's socket near the starting point, and the 2nd one should be near the incinerator.
Player is encouraged to take the cubes in and out of sockets to open other doors :).
Again thanks for playing our game ^w^, I will def check yours out :)