Hey guys.. congrats on your launch! I just gave AssetSpace a quick try and I must say I really like the interface you have created there. It is indeed very easy to understand. I think the sidebar menu on the left-hand side is a good solution for your product and shows everything that is available at a glance. Also love the branding and the colour pallette, but that's very personal I guess :).
I am no asset management expert, but the feedback I have for improvement would be to add Sign-up with google, but I also know it can be a pain to implement with a small team..
Secondly, I think a couple of "help" buttons wouldn't hurt, maybe just some explanations of what to do on each page (although it's quite intuitive, it sometimes can give users a bit more security).
Also, an undo button for when you have deleted an item would be nice to have. Hope this is useful..
Well done you guys and good luck!