In-game guide improved and flower upgrades visualised

• [p]The in-game guide has been reworked. Sections will unlock and show a notification to the player when relevant.[/p]
• [p]When upgrading flowers between islands, a diagram of the flower's area of effect will show and reflect any upgrades added.[/p]
• [p]A bunch of tweaks and bug fixes.[/p]

[p][/p][p]Demo and full version have been updated.[/p][p][/p][p][/p][p][/p]