Link 'em Froggy!

Round up your enemies and link them together into a train of pain!

Killer Krow - Fires single shots.

Reviver Rat - Heals adjacent units, scares easily!

Tommygun Turtle - Has a lotta health, fires multiple shots.

Didn't get anywhere near finishing this, but at least it's something playable.

Attributions 

Rope pull 1 - https://freesound.org/people/Huggy13ear/sounds/138959/
Bamboo swing - https://freesound.org/people/InspectorJ/sounds/394412/

Salty Ditty by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song/4315-salty-ditty
License: https://filmmusic.io/standard-license

Fluffing a Duck by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song/3766-fluffing-a-duck
License: https://filmmusic.io/standard-license

The Show Must Be Go by Kevin MacLeod
Link: https://incompetech.filmmusic.io/song/4509-the-show-must-be-go
License: https://filmmusic.io/standard-license