A nice point and click game that reminds me of the Flash games era. We all played a point and click game at some point in our life ;)
The fact that you could rotate the testroom gave you more room (pun intended!) for interaction. So props to you!
Apart from the 'test failed' message even if you won, I found no bug at all so that's great.
I think that introducing the characters at the start of the game could help you understand their strength faster. I didn't read their description so I ended up randomly interacting with things until it worked. But after reading their description, everything made sense!
Other than that, good job Popanoel and SdeMatos I can't wait to see your next project :)