Question

Is there some way to make some sort of graphics for our game on this platform or do we have to upgrade?

Answer 1

In this thread the Admin explains how to use the "Display Screen" feature.

In any language, you can do character graphics.

I have written a silly 2D raster renderer in Java and C++, where you can render lines and polygons drawn on the character screen. Here is the C++ version.

Otherwise, for any proper graphics, you'd need things to run on your local computer, not on a server (as it happens with OnlineGDB). Look into

1. PyGame
2. Unity
3. Unreal Engine

As you go down the list, the difficulty to use increases, but so do the features offered by the engines.