Looks great, but I see a possible problem with your left loop. Yes the kicker is there, but as play happens the kicker will get weak. It could be just weak enough to bring the ball to the top of the loop and drop it straight down to the bottom. If that happens (and it's pinball so it WILL find a way, even if it jumps over a target into that area) it will be stuck between the exit of the loop and the upper gate.

PS. I expect a metal version of the "Lava Powerhouse" music in this game

You mean stuck on/under the gate armature? that's n easy fix imo.

You have a lot of space to the left of the gate. drill a small hole, add a spring, and make it a controlled gate. If the ball gets stuck, then during a ball search you can pop open the gate so the ball dribbles down into your loop fail-safe area.

OR

make the loop exit point higher (.75" higher) and have no gate at all. Similar to those plunger lane half ramps you see on a lot of stern games that drop the ball right into an orbit. Adjusting the loop to not be a perfect circle could also boost some power via centrifugal force if done right I think... don't quite me on that though.

Edit: ... actually that may fix your problem.. Lemme make a drawing

Notice the exit of the loop is always going down-hill up the table! that way the ball can "never" get stuck as long as the table angle is correct. And, no the loop positioning isn't correct, this is a rough mockup to give you a visual of my thoughts.

Also: My loop not being drawn round is not an error. Round loops == bad & bumpy motion. Ellipsoid loops == smooth motion. I recommend watching and reading about rollercoaster loop design. The principles would be the same here.
Image1 (resized).jpg

This^
A nice bright yellow led to make the rings glow would look awesome. And, since those leds are controlled, you could make them shimmer too.