I made this game a few years back, in my old company 'Titoonic'.
Eat the other insects to survive. Beware of the burning fire-flies! Control the spider using the mouse or the arrow-keys. LEFT and RIGHT key moves the spider sideways. Jump using the DOWN key. Hold down key longer, before releasing, to jump higher. You can use the mouse also but keyboard gives you better control. Click and drag the spider downwards and then quickly release it to make it jump. Control the direction of the jump by dragging the spider sideways when releasing.