Games you remember playing but can't remember the name

[felixmole]

I remember playing a 3D PC game when I was probably 8 or 9. It was a frog or a turtle or something like that. You had to make your way through various levels where there were obstacles (for example moving platforms you had to jump on to; big moving objects in narrow paths you had to avoid) or enemies garding some areas you had to cross, and as soon as you stepped into areas of that type they ran at you, and they gave up when you got out of it.

I know that's very sketchy but I played that game at school in (give or take) 2000. I hope I'm not mixing anything up there... Any ideas?