| Controls |
| | keypad | alternate | cursor | |
| | 4 | A | <left> | ....... | move left |
| | 6 | D | <right> | ....... | move right |
| | 5 | S | <down> | ....... | stop moving |
| | 0 | L | <space> | ....... | fire |
| | P | | ....... | pause / resume |
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Scoring:
25 points for every invader, 1 per bomb, 200 per level, and a bonus for each new wave.
Following to what seems to be a convention in other invader games, you are only allowed to shoot four shells at a time.
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