Count in roman style

Dear children, welcome to the world of the Roman Empire. This game is designed for you youngsters, to learn Roman numerals in easier and more fun way!
So, let us begin the game called ADDITION IN ROMAN MEASURE!

This game has five levels. Each level is harder than the previous one, and the chance is greater for you to learn more.
The value is set in the upper left corner, randomly selected, in roman format.
In the upper right corner is the current collected amount in decimal notation.
The numbers that are collected, actually those that decrease, are called the Roman numerals. They are collected using the key to move Coliseum left and right.
The buttons are located on the bottom corner, left or right.
If you want a break, it is possible by pressing the PAUSE button.
If you exceed the given sum, game pauses and the quiz question appears.
If you answer correctly to the question, game continues, but reached sum is then reduced to thirty.
If you exceed one more time, the game ends and the table with your result appears where you can enter your name and see where your position is.
When you finish the game you can see your score and the result of your buddies!
Good luck!

I level:
In the first level, and also in the following ones the Roman value of the number that you should reach is given randomly.
At this level, the highest number that can be inflicted is ten (X-Roman).
Roman numerals that are being collected are counted in decimal notation.

II level:
In the second level, the highest number that can be inflicted is twenty five (XXV-Roman).

III, IV, V level:
The numbers are significantly higher than the numbers in the previous two levels.
In the third, and every following one can be found blue Roman numbers, and if you collect them, the current collected amount is reduced by the value of that Roman numeral.