[Van-de-Graaff Balloon] Player cannot interact with the experiment

[GameLabGrazTrainee]

Describe the defect In the experiment, the player can only start/stop or change the visualization (top right). However, there is no other way for the player to interact with the experiment.

To Reproduce Steps to reproduce the behavior:

1. Go to Van-de-Graaff Balloon
2. Click on Start
3. Try to move the left object with the arrow keys
4. See error

Expected behavior When pressing the arrow keys the leftmost object moves from left to right (like Van-de-Graff Generator).

Found in version v4.1 build 20210722

Desktop (please complete the following information):

• Windows 10 Home
• Version 20H2 Build 19042.1081