If the game doesn't run - download and install Java JRE 7 from:

http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1637588.html

Move with arrows. Eat 5 fish to win. You may get mutated if you stay close to radioactive material (watch the speed meter).
move player-up,down,left,right,o,l
rotate camera-w,a,s,d,q,e
rotate player-z,x,c,1,2,3,
space-change camera position to player and back
secret codes-f,g,h,4,5
press M to reset
there may be another secret special code-check your keyboard