Yes to both of those!
Circular Radar is the sample UI we provide. You can also see another type of UI we use this game which is more like an Oscilloscope (https://mythatelier.itch.io/candle-dark). So long as you provide the spritesheet and set the dimensions of the window, the UI can change to any sprite with a frame based animation.
For different thresholds on each map you can set this quite easily by using Plugin Commands to change the minimum steps for each threshold. This can be done in an Event that Autoruns at the start of the Map before erasing itself.