HeavyPaint UI/UX Concept

I recently started doing some paint studies (as you can see, ha!) and my boyfriend recommend me this app called HeavyPaint, it has a super simple interface but it was kinda hard to understand. So i decided to give it a try and create a new interface concept.

Hope you like it (L)

App. http://www.heavypoly.com/heavypaint
Font. Roboto
Icons https://remixicon.com
Photo reference. https://500px.com/photo/1003451219/idle-hope-by-erwin-bosman