Quick summary of controls:
Left "a", Right "d"...... Jump: "j"
Also. the "spikes" are actually bullets. These can stick into walls and you can jump on them. Learn later to shoot these using "k"
"springs" actually make you fall through the floor.
"jumping shoes" make you jump less.
The green "gems" kill you. Don't get them.
Also. you cannot die by "falling" off an edge.