"Collect" all the items and win.

collected = {} --what items were collected by player y, per player
coords = {{x = 500, y = 325},{x = 100, y = 325},{x = 200, y = 325},{x = 300, y = 325},{x = 400, y = 325}} --coords for each item/ground//whatever
size = 10 --in pixels, the item hitbox is 2*size by 2*size

function eventNewPlayer(name)
    tfm.exec.bindKeyboard(name,32,true,true)
    ui.addTextArea(0,"",name,5,27,nil,nil,0x32464F,0x32464F,0.9,false)
end

function eventKeyboard(name,key,up,x,y)
    if (key == 32) and (#collected[name] ~= #coords) then
        for i=1,#coords do
            local exists = false
            for _,ob in pairs(collected[name]) do
                if ob == i then
                    exists = true
                end
            end
            if exists == false then
                if (tfm.get.room.playerList[name].x >= coords[i].x - size) and (tfm.get.room.playerList[name].x <= coords[i].x +size) and (tfm.get.room.playerList[name].y >= coords[i].y - size) and (tfm.get.room.playerList[name].y <= coords[i].y + size) then
                    ui.updateTextArea(0,"Item " ..i.. " collected",name)
                    table.insert(collected[name], i)
                    if #collected[name] == #coords then
                        ui.updateTextArea(0,"You have collected all the items!", name)
                        tfm.exec.giveCheese(name)
                        tfm.exec.playerVictory(name)
                    end
                end
            end
        end
    end
end

function eventMouse(name, x, y)
    tfm.exec.movePlayer(name, x, y, false, -1, -1, false)
end

function eventNewGame()
    for name,player in pairs(tfm.get.room.playerList) do
        collected[name] = {}
        ui.updateTextArea(0,"",name)
    end
    for i=1,#coords do
        tfm.exec.addPhysicObject(i, coords[i].x, coords[i].y, {type=4, width=20, height=20, foreground=false, miceCollision=false, dynamic=false})
    end
end

tfm.exec.disableAutoShaman(true)
tfm.exec.newGame("@0")
for name,player in pairs(tfm.get.room.playerList) do
    eventNewPlayer(name)
end