Steam SHMUP Fest 2023 Demo

[list] [*] released demo with tutorial and first 3 biomes [*] added message to credits for demo [*] added Rebuild option in Modify menu to toggle permadeath [*] added Energy Whip upgrade which replaces laser with whip [*] added rotating blast tip and shockwave rings to laser [*] added dissipation timer to laser [*] added energy wheel fade from green to yellow when energized and depleting [*] adjusted floater model and colors, added boost effect, now spawn in gravity grotto [*] adjusted robot model, now flashes continuously when enraged [*] replaced gravity grotto key with +1 max HP up [*] fixed jackhammer hitboxes [*] fixed biome not resetting upon game completion when Rebuilding is active [/list]