Visual Feedback:
Menu Screen:
Interactions(buttons): Buttons should highlight if hovering and flicker if clicked.
Taking Damage: If the player is crushed by an insect, there should be an flatten animation.
Health and Stamina: Health information will be displayed with a health bar.
Low Stats: If the player's health or stamina is lower than 60%, the bar should turn yellow, if it's lower than 30%, the bar should turn red.
The screen should also have a red vignette around the edges to convey the critical state to the player.
Eating Insects: If the player consumes an insect, there should be an animation followed as well as text displaying how much DNA was earned.
Purchasing Upgrades: If the player purchases upgrades, it should visually show how much currency has been removed from the player's total.
Audio Feedback
SFX:
Taking Damage: If the player is crushed by an insect, it should play a squish sound.
Eating Insects: If the player consumes an insect or their waste, it should play a crunching sound.
Collecting Currency: If the player collects currency, it should play a synthetic chime sound.
Purchasing Upgrades: If the player purchases upgrades for core stats, it should play a cash sound effect("Cha-Ching").
UI Interaction(button/menu): There should be pop or tap noise when interacting with buttons on the menu or upgrade.
Music:
Menu Screen: Should be a mellow, melodic and lighthearted tune.
Gameplay Screen: Should be an erratic whimsical tune.
Death Screen: Should be lighthearted and motivating, since death isn't permanent.
Upgrades/Evolution Screen:
Upgrading should set the tone for decision-making and progression. A futuristic vibe, perhaps light synth.
Evolving should be more impactful and mysterious.
Examples:
Health Bar/Stamina Bar Example
Character Death/Flatten Example
Enemy Consumption Example
Upgrade Screen Example
Purchasing Upgrades Example
Currency Earned Feedback Example
Button Hover Example
Low Health Vignette Example
Low Stats Example
References:
Health Bar Thumbnail: https://www.youtube.com/watch?v=BLfNP4Sc_iA&t=1s
Character Death/Flatten Image: https://nonhuman-video-game-flattenings.fandom.com/wiki/Mario_Party_Advance
Enemy Consumption Image: https://www.snakegame.net/how-to-play-google-snake
Upgrade Screen Image: https://anubitius.artstation.com/projects/KaPLoo
Purchasing Upgrades Image: https://www.dailymotion.com/video/x45xwxh
Currency Earned Image: https://www.reddit.com/r/TownshipGame/comments/1f95cph/how_many_times_have_you_won/
Button Hover Image: https://minecraft.fandom.com/wiki/Title_Screen
Low Health Vignette Image: https://interfaceingame.com/screenshots/doom-eternal-low-health/
Low Stats Image: https://www.istockphoto.com/vector/pixel-game-life-bar-pixel-art-8-bit-love-loading-rate-your-love-love-measuring-gm1438463260-478963529