Add custom test scripts for interactions games interactives

[#69191506]

They only load the second level. I tried to interact with controls
or execute scripts, but gave up to avoid spending too much time on
this.

Controls are problematic on mobile devices (as usual), while in this
interactive scripts are pretty complex and e.g. "launch particle"
button executes a few commands. We can copy-paste them, but the
test wouldn't be flexible enough. If anything changes in interative
action scripts, the test wouldn't make sense without immediate update.