Upgrades & more

After returning home from the holiday, I started working on somethings. I added more upgrades so that the player could spend their coins as they wanted. I also created a special attack, the sound wave, which is activated with the right button of the mouse, and after a certain delay. It can also be upgraded, having its delay time decreased. 

Upgrades now increase their cost after the player buys them, this way making coins more useful in the late game.

The waves algorithm have been changed, so that it doesn't get too hard for the player after wave 10. (It still needs change)

A new type of enemy has been added to the game. This one shoots at the player. However, I've run into some issues implementing the health bar for the player, so it is something I will implement later. For now, the enemy bullets don't deal any damage whatsoever.

The price for healing the motherboard was decreased, from 50 to 20 coins, and now it's more accesible to the player.