Glitches! – Gmail - Email by Google Review

I’m having glitches galore. When I click on an email, it won’t open and also, when I read emails, they disappear after I read them. Please fix this. Suggestion: I’d love it if we could delete multiple emails at once instead of clicking one by one. Could you make it so I can just slide my finger down the list and it would check off all those emails and I can then delete them? For example: If I have multiple emails from a store, it would be nice to just slide my finger down the left side where you click the emails and I could delete multiple emails at once instead of one by one. It takes forever to delete individual ones. Please????
Review by OnlyMe&NotYou on Gmail - Email by Google.