Sparklite

This is the boss of the second area in the game, which you'll unlock after beating the Titan Slayer boss. This boss was considerably easier than the first boss and I essentially ran right to this boss, skipping most of the Goldenwoods. If you do find yourself having trouble, the same method applies to every boss: focus on farming gems for upgrades and clearing out as much of the map as you can, looking for pickups and chests.

This boss really only has two major attacks you have to worry about but he'll alternate them, making them easy to predict. The boss slowly walks around the level and his four feet will do damage if you're close enough. Move in and out, attacking each foot when it isn't stomping, until the red light on each foot turns black.

Periodically, the boss will employ one of two attacks. Its right arm is a log, which will hover your head before trying to smash you. When it stops above you, dash away and it should miss you every time. His other attack is a series of sawblades, which will spin in a circle around each leg and his entire body. If you know the sawblade attack is coming, give yourself plenty of space and by the time the saw starts flashing, you'll be nowhere near the attack.

Each time all four lights on his feet turn off, he'll stop, giving you an opportunity to attack him from the front. Once he starts moving again, rinse and repeat.