Question: is Lv99 the max? I am going to 4 runes/Endless/All Runes everything eventually (Got in on Switch about 2 months ago) but this one and Secret Level made me wonder if I needed to max out to pass them because OMG *how* XD
Once I got to level 43 I only had experience of the previous 42 stages. The Casino stage is actually easy. I finish it with 1 life very easily. You get the flashy yellow guys later on and you have to INSTANT KILL units. I use the spring platform to shoot them off and the hook trap to pull them off if they get past.