v0.7.2-beta/demo update: 2 new challenges and more! — Witchcraft Survivors Steam update #1103069

New challenge: Shorter Runs In this challenge the level timer runs twice as fast! Enemies spawn twice as fast too! New challenge: Speed up In this challenge both the hero and the enemies have a faster movement speed! New achievements New (steam) achievements for beating the above two challenges Improvements to the costs in the shop/upgrade system Costs now rise linearly by the number of previously purchased upgrades. The system before had rising costs depending on the total gold/xp amount spent, but that had the problem that there were different total costs depending which upgrades you purchase first and which later. Enemy balancing Adjusted movement speed of some enemies so the enemies are a bit more different compared to each other. Also scaled down the damage of enemies in the crypts on higher difficulties, as they were able to nearly instantly kill the player.