Open TD v0.0.6: The easy update

A new important feature has been added! The game will now save after defeating a wave. This means you can now quit and continue later if you want. You can also restart a wave when you lose without having to start all over.

Besides saving/restarting the boss enemy was also tweaked to attack slightly slower and show how much hp they have remaining. Finally a new difficulty was added: Practice. In this mode you have infinite money and achievements are disabled. Great for testing out the game and its mechanics.

Last but not least I've added a little screen shake and explosion whenever a tower is destroyed. Destroying the base triggers more screen shake and explosions.