Start with adding array object to your game.
Then set so every now and then an event trigers (when moving betwen levels or at exiting the game)
array -> set value at X
array -> save AppPath & "[insert_file_name_here]"
Do the same at the start of the game but just the load:
array load AppPath & "[insert_file_name_here]"
do make you understand arrays (which sounds scary) lemme compare it to Excel sheet. So you have rows and colums. The only diffrence is that array can be rows only, or rows and columns only, or rows and columns + additional 3rd dimension. like X, Y and Z axis.
And you store your information inside. You just have to remember what is where. Under what coordinats
for example. if i want to save a value of the score you can use just 1 dimensional array with X axis only. And so you would:
Set array value (X1, Y1) -> 10
and then at "save point" you do
Array save -> AppPath & "Array name"
This will save your array file in the main exe folder. The file name will be whatever you typed in "Array name". Ofcourse you can also add some extension name to it like "ArrayName.rar". And why it would benefit you read here