Add Drop and Item classes
Draw drops on canvas
Refactor Canvas
Refactor Canvas
Add Item#id attribute
Merge branch 'master' into items
Implement removing drops on touching
Refactor Player#touches
Implement Player#money
Draw the player's amount of money on the screen
Add picked up money to the player's pocket
Merge branch 'master' into items
Improve Drop and Item toString methods
Fix GameLogic
Add Player#items
Put items in the player's bag when picking them up
Merge branch 'items'