Here is a list of controls for City Slicker by Hewson.

Q/W,E/R,T/Y,U/I,O/P,@,[ - move left/right
SPACE,SHIFT,COPY - jump
J,K,L,:,;,] - pick up/activate an object
A,S,D,F,G,H - drop an object
ESC - pause (press ESC again to unpause)
RETURN - toggle sound effects on/off

To select an object to drop from your inventory, pause the game using ESC and
use the left and right keys listed above to select the object. Now press ESC
again to return to the game.