I was trying to login to salesforce through my phone but I’m not able to. It says that it has sent a verification code to my number(inbox) but I haven’t received a code yet. I can’t login to salesforce app through my mobile. Please help.

Sorry you're stuck but there's almost always a pretty easy fix! Do NOT try to start all over again, uninstall Max's Pitch Package, etc. That can make it worse. There's a 95% chance the same snag/fix is listed & answered in the Help FAQ. But if you can't find it there, post your problem here.
Make sure you post in the right category below & be sure to include a screencap showing the issue!
Well fortunately you can still create both deliverable screencaps without using the mobile app, so if you can't get it working, it's ok - you can still get full credit for the assignment.
But you still should be able to get the verification code - it's saying it's sending it to you via text message. Are you still next seeing the text?