This is great! I think my favorite of al you've written right now! I love it love it love it!

"Her cage may only be opened from the outside." You may not have meant it this way, but I read this from a religious perspective, and I think it's fascinating to think that God keeps us 'caged' here on earth because we're not 'ready' to live beyond our walls yet. :)

I like how when you progressed to compare yourself and the mouse, you repeated the lines, with a simple adjustment. (Wheel squeaking ominously/Trees scraping ominously). It added to the poem and enhanced the comparison greatly. Nice work!

"She wonders how it’s fair
That her cage may only be opened from the outside
And that she can’t get out"

I liked those lines alot, great idea to compare being lonely to the mouse in the cage! I loved it!

Hmm this one's quite depressing, but I see where you're coming from. It's like you're deafening yourself with your cries for help that no one else seems to hear, am I right?

Definitely well written, and I like the comparison. Good job!