Moorhuhn 3

Bonus Time:
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If you shoot the Hut on the cliff in the last second of
game play, you receive 10 extra seconds of time. 
Turn on the lights If you shoot the Hut on the cliff 10
times, the lights will come on.  After doing this, if you
shoot the middle window four times you will shatter the
lights and gain 50 points.
Hidden Treasure:
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If you shoot the tree the far left, three pieces of
bark will come off that reveal a treasure map. The
three symbols indicate the location of hidden caves
in the game, and the ‘X’ marks the cave which holds
hidden Moorhuhn gold. 
These caves must be opened by using the green 1A
ammunition to shoot the rocks in a specific pattern.
When the gold is revealed,  shoot it to receive a
“TREASURE BONUSES” message and a 200 point bonus.
Moortris:
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While on the Moorhuhn 3 splash screen, if you shoot each
letter of the title (M-O-O-R-H-U-H-N) a Moorland Chicken
version of the classic Tetris game will appear.