ok, I see you added the images in the course description. The clean theme (the one you're using in web) displays them, but Boost theme doesn't.
In the app we took the same approach as in Boost theme, so we aren't displaying them (this was a design decision). I'll raise this issue to the rest of the Mobile team and the UX team to verify if we want to leave it like this.
As a workaround, you can display those images where the color squares are displayed right now. To do so, you need to add the images to the "Course summary files", like this:
Regarding accessing the course, you should be able to open the course by clicking the course name (in your screenshot, "Mater Dei Institute 2018 ...") or by clicking the course image / the color square.