nice going, and I can see how making 3 different mini games would be excellent for your Godot learning!
here's a recording of my playing all three.
Took me a sec at the start to work out if I should mouse click or how to activate buttons :D
Space survivor was good, took me a little to learn about the collecting of the gold (I was assuming I got it from the kills, missed the gold coins) and that letting them past was fine, it was MY health I should worry about :P.
then just as I was getting bored, the red ships rock up, nice :)
On to
Gold digger was a surprising fun game, kept me going for a while :), but I would like some control over going down Faster,.. if the player reaches the bottom row, force the camera down with them or somthing, can see from the video I was getting bored/frustrated on the restarts from the top each time :D