* Read the manual (particularly pages 12 and 13). We all like to
think we can wade in and succeed uninformed. But take it from
me: you've got to take Penguin 101 to win.
* If you approach gremlins from a rear three-quarter angle, they
won't take long at all to capture, and therefore should never,
ever be ignored.
* Don't try to win a given level the first time out. Instead,
learn it. Deduce where the bad penguins materialize, the path
they take, machines in their way, and so on.
The game automatically saves the last completed level, so you
won't drop back.