Hey heck, the second to last line in game says press enter
I forgot to post feedback after playing it. The game runs perfectly for me on vista 64, although I couldn't manage to beat the first wave of enemies.
There were a few spelling mistakes I found:
The game title inside the applet is misspelled.
In the Introduction North See should be spelled North Sea
the line "sink as much as you can foe oil tankers and avoid enemy destroyers. " reads a bit strange
"sink enemy oil tankers and avoid destroyers. " reads better but there is probably a better way to word it.