You are a medical nanobot called Tiny Peter. You have been sent inside the body of a sickly alien to help cure it of its disease. You have to make contact with the diseased cells in each area to remove them. But also be careful of the alien’s natural defences which will sap your battery power on contact.
The game was made by Sunteam in 2023.
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Huge playlist archive with ZX Spectrum Next software: