Player movement is possible, but I recommend you to use @zaethan s Player controller node which is a way around the problem that to my knowledge it is not possible to do proper and working jumping only with nodes, since this node basically acts like a full Haxe script.
The doors, shooting, doing and taking damage and item collection is not a problem, but there currently is exactly only one node that handles UI, so you will have to get creative with custom nodes there. Game settings are completely missing, I can’t even find an example in which you can change them via code in a game’s menu.
Enemies are possible, but the node setup is going to be messy and complicated. You will need to usea Navmesh, which I have never been able to setup on my own, I always had to use the example one and adapt it. There also is no built in line-of-sight node, but you can cheat with a physic ray.
Level loading is possible too and you probably even can save health, hp, ammo and such with the “Write/Read Storage” nodes, but I personally have no experience using them.
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