Some commands I played around with 

particles: execute at @p run particle minecraft:lava ~ ~-1 ~ .1 .1 .1 .01 10 normal @a
red wool death: execute at @p if block ~ ~-1 ~ red_wool run kill @p
lime wool jump: execute at @p if block ~ ~-1 ~ lime_wool run effect give @p minecraft:jump_boost 1 5 true
black wool launch: execute at @p if block ~ ~-1 ~ black_wool run effect give @e minecraft:levitation 1 100 true
light blue wool speed: execute at @p if block ~ ~-1 ~ light_blue_wool run effect give @p speed 2 3 true
knock stick: /give @p stick[enchantments={levels:{'minecraft:knockback':100},show_in_tooltip:true}]