In this game, you play the part of a spaceman trapped in caves. The only way out is to help the local flora. The caves are occupied by bugs and other nasties which will stomp on the plants. By shooting these and protecting the plants, the plants will grow. Once all are fully grown, you may enter the next cavern. To some extent, you have a symbiotic relationship with the plants in that you can hide behind them to both increase your energy level and avoid the bugs.
Each cavern is larger than the screen and the display scrolls from side to side to accommodate the play area. A feeling of depth is given by having a scrolling foreground and moving the stars at different rates. The figures are built up from several redefined characters giving pseudo sprites. These are nicely coloured and, in the case of the spaceman, neatly animated. In order to spot the approaching nasties, you are provided with a radar area at the top of the screen.
The use of sound is limited to zapping sounds, but is tolerably effective. The use of colour and . redefined characters is excellent and shows the versatility of the C16.
Overall this is a fast action shoot-'em-up game which is challenging and fairly original. The price is reasonable and overall the games represents good value.