I made a little example about the game mode where you have to press a key quite fast many times (I’ve suffered it in Dead Space, and have seen it in a game about Jurassic Park, and NFS: The Run): Download .zip
Model made in Blender, autocut images in the GIMP (the blue point helps me to locate the Sprite origin point in GD)
You’re right, the ‘trigger once’ action do the magic. I check the project once again today and I noticed a lot more of things in the event window that I don’t see yesterday like the green comments and many other actions, and the example works fine right now. I guess if it was a project load malfunctioning, I open it yesterday after been working in a project for more than a day, just putting to sleep my laptop on the spare time. In my experience, sometimes GD is getting some wacky after a while. I’m using the latest version of GD.