Guess what the down arrow button does to the webpage...

In this case though, I actually managed to make it to room 3 before suddenly being eaten, so there's progress! I would advise you to do some serious troubleshooting on the controls/webpage behavior though. So far it's only with your games that I run into this, which I believe are the only Clickteam based games I played so far. I'm starting to see a connection here...

Alternatively: screw troubleshooting and only assign keys in your games that aren't related to browser functions.