In chapter three you get a pretty good mix of enemies from the previous two chapters. You should be pretty familiar with them all, but if not, here's some tips to help you out!
Green-Winged Bat: They hover for a bit lunge towards you in a given range, even flying above walls. Just keep your distance or wait for them to lock onto you and side step.
Red-WingedBat: Same as Green-Winged Bats but faster.
Purple Crocodile: They breathe fire that reach a specific distance. Once they lock in, just side-step once they start their attack process.
Green Snake: They slither to you, once they lock on, they lunge at you. Just side-step when you see them stop and prepare their lunge.
Blue Spider: They are kind of just like the GreenSlimes, but they're a bit more beefy and move quickly. They don't aggressively target you, so just try to stay out of their way.
Brown Worm: They burrow under the ground and pop up to shoot 3 lobbed projectiles at you. The best way to deal with these is to stand still for a slight bit and let them aim at you, once they locked on, you can move. They can be a bit annoying if you are using a slow weapon because you might not get a lot of shots in on them.
Living Bomb[]
White Living Bomb: They lob a bomb at you. Their range don't reach the whole map but it's quite far. Keep moving or stay as far as you can.
Blue Living Bomb: Same as White Living Bombs but they lob 3 bombs instead.
Red Living Bomb: Same as White Living Bombs but lobs blazed bombs instead. They can be quite dangerous because the bombs leave a small fire hazard where they drop.
Plants[]
Cactus: They will target you pretty quickly once they see you, and you'll see a red path on where they are going to fire. Their attack speed is quite quick so you'll just want to find a spot on the map that isn't covered in red immediately.
Purple Plant with Blue Vines: Shoots 1 lobbed projectile at you. They stay in place and fire off projectiles. Just wait for them to target you and then move out of the way!
Purple Plant with Green Vines: Same as Purple Plant with Blue VInes but shoots out 2 lobbed projectiles instead.
Green Tree Stump: Shoots projectiles in 4 directions after bouncing. Just stay away from it's 4 projectile trajectory which is up, down, left, and right.
Blue Tree Stump: Same as Green Tree Stump but shoots projectiles in 8 directions after bouncing. Just be careful with the extra 4 diagonal directions.
Rock Golems[]
White Rock Golem: Spins and throws 3 rocks in a fan shaped area at you. 1 goes forward and 2 goes diagonally. They're a bit tanky so make sure to keep distance as their projectiles can hurt badly as well.
Blue Rock Golem: Same as the White Rock Golems but throws 5 rocks instead. Just keep your distance as usual.
Slimes[]
Green Slime: Randomly dashes everywhere. Stay away as their dashes are unpredictable. The distance they cover isn't that far away.
Red Slime: Same as Green Slimes only a bit faster. Releases 2 Green Slimes when killed. Keep adequate distance but not too far as your attacks might get dodged a lot.
Undead[]
Green Archer: Shoots an arrow at you. The arrows can be easily avoided by waiting for them to lock on to you and side step at the right time.
Red Archer: Same as the Green Archers but with Bouncy Wall upgrade. This gives them extended range as their arrows bounce after hitting the walls, which is also signified by the red line of sight.
Tornado Mage: They release tornadoes that zigzags to you. The walls stop these from hitting you. However, if you don't have a wall to use, try to anticipate the movements and then dodge accordingly.
White Skull: Chases the player constantly. They move slow so just keep kiting and you'll clear them pretty quick.
Yellow Skull: Same as White Skulls but releases 2 White Skulls when killed. Keep more distance as the release might touch you.