https://cpcrulez.fr/GamesTest/spiky_harold.htm (https://cpcrulez.fr/GamesTest/spiky_harold.htm)
One of the first games I had on the 464. Despite the large number of lives, getting into a bad situation usually meant game over quickly. Precise waiting for things to kill you to move out of the way, and pixel precision jumping was required.
Even with unlimited lives, falling or jumping into the next screen could get stuck in a death loop!
Anyway thanks to the invulnerability cheat I've now mapped the 57 rooms and see the completion. Not sure how to get this onto CPC Power