Looking for an old game on Apple II, don't remember the name.

Hello, new to the forum.

I'm hoping you guys here can help me, I am looking for an old Apple II game that I could just barely remember and I forgot the name.

The game basically goes like this: you are a guy or some sort, and you move around moving blocks in a room level (simply run into the blocks and they move with your on screen guy) and try to form barriers of some sort to block and destroy some snakes or caterpillars or whatever (snakelike) things coming out of the walls trying to get you.

You can go through several levels, all of them rooms with walls of various designs.

I only remember this because it is very easy to get stuck in the game depends on how you position the blocks in such a way that you can't crush the snake/caterpillars/whatever and you can't move the blocks anymore and the game never ends.

Anyways apologies if I can't really describe any better, this is all from memory when I was still about 6-7 years old. (I'm now 32)

Hope someone can tell me the name of the game, or find some screenshots, thanks.