Amazing stuff, I love all the artwork in this one! A few suggestions for you...
- Show me my stickers! LittleJS is super fast at sprite rendering, you can use this to draw all the stickers the player has. The artwork is so great for the animal stickers so it seems like it would be really worth showing them as much as possible and also provide a visual sense of achievement for the player.
- You can remove the text in the top right by using setShowWatermark(false), or just using the release build.
- The post processing may need some tweaks to work better in your game. Try disabling the vignette (darkening of edges) and maybe generally tone it down a bit. It needs to give a little warmth without being overbearing.
- For the reset progress button you could just use a confirm prompt. That way it is super obvious for the player what is happening and also makes it easier for your UI.
- When it says new over the stickers, if you have more then 1 of them, after keeping it the new should go away for the others since you already have one in your collection.
- Maybe simplify the sell process, like an auto sell button for everything you already have.
- Crazy idea but maybe there could be like a mini stock market where prices of things go up and down.
- Another crazy idea but it would be cool if you could actually stick the stickers. Like imagine there is a wall where you can actually place the stickers.
Keep up the good work! These types of economy based games can be tricky to balance so I hope you continue working on it and listening to player input.