More or less that's its how it works in a D&D based game, a warrior (player for example) has a d10 health points (d10 dice), at level 1 has 10 health points, at level 10 has 100 points, each level you can earn a bonus to health points based on constitution , if you have constitution 12, then you have a +1 to each level, so, at level one you will have 11 health points and at level 10, 110. Your system is as good as this one if you compare it. :)