Thanks for reaching out! The point of that testing screen is to ensure you can make full use of the game’s abilities with your input method.
You should be able to rebind the player controls from that same menu by holding “enter.” From there, just rebind the movement controls for the player.
For WASD based controls, here is an example scheme I used for testing:
You can also try using a controller. The game should auto-detect and swap to any controller you connect.
The reason this test exists in the first place is due to a hardware problem known as “input ghosting” or “keyboard ghosting.” The short explanation is that due to the way some keyboards are manufactured, certain keys can overlap and cause them to drop out entirely.
If the issue still persists, or you run into any other problems—please let me know and I’ll do my best to help fix it!