How do I open the pyramid door

Hint 1 of 5:

I assume you got rid of that pesky sand pile.

Hint 2 of 5:

(Using the broom alien.)

Hint 3 of 5:

The lock has no matching key.

Hint 4 of 5:

Maybe you should pick the lock.

Hint 5 of 5:

Try using the bobby pin sign.