shieldingBoss

shieldingBoss - doesn't attack, but shields all mobs every 2.5s

reworked how tetherBoss's constraint work
  please, let me know if the tether boss is buggy on any of the levels
  the chance for tether boss was removed from level: detours

tech: flip-flop - collisions do 25% more harm, but you become immune to harm for the next collision

js/simulation.js

@@ -1002,7 +1002,7 @@ const simulation = {
                 //ctx.fillText(bodies[i].id,bodies[i].position.x,bodies[i].position.y);  //shows the id of every body
                 let vertices = bodies[i].vertices;
                 ctx.moveTo(vertices[0].x, vertices[0].y);
-                for (let j = 1; j < vertices.length; j += 1) {
+                for (let j = 1; j < vertices.length; j++) {
                     ctx.lineTo(vertices[j].x, vertices[j].y);
                 }
                 ctx.lineTo(vertices[0].x, vertices[0].y);