• Slope blocks sound nice but that often takes away from the whole point of the editor (Arcade).
There have been many great slope attempts and there is an extension I think.
• The “AI” you want can be done easily without special block, and you kind of have to think every extension block, every regular block even is just other blocks put together like a function. How would you make a function for “AI” opponents that would work for every possible project. It’s a great thing that we have the Arcade > Help category for stuff like that.
• The screen resize code in Java I don’t think was ever really meant to be used in the first place. (Mostly because they want to stick with the Arcade theme.) I do however think that a block like that could be great but with 3-4 fixed setting like Extra Small Small Medium and Big.
•You can do that but not really in the way you think. There is a block to play a wave and you can make that into any note. I don’t have enough knowledge of the music system as I’ve never used it but that’s not a bad idea it would just need to be implemented in an easy and user friendly way.
• Believe it or not you can do this even with a limited knowledge of the editor! Here’s a great tutorial by @Brohann for every step of how to do it just make sure to read it all before you attempt anything. [Tutorial] How to Change the Simulator Color
I just wanted to pass on some knowledge I’ve gained an explain why we don’t already have some of the features you mentioned.
Good luck!