Well, it's all right. Certainly doesn't have Donkey Kong's staying power, though I'm sure transposing the Zaxxon isometric perspective into a platformer was pretty dang impressive for '83. You do run into a readability issue though - the perspective makes it tricky to judge jumps throughout and where coconuts will land in Primate Peak. You can eventually figure it out, but it's less intuitive than the side perspective.

Also, is this the first video game to feature wall jumping? It's clearly a bad idea here, but funny to think that such a technical move got its start in a game where pulling it off mostly means adding insult to injury with a lost life.

Those rhinos are pretty dang cute, though.