The arcade version brought to your pocket, Space Invaders can get tiresome however.
Gameplay is an issue which takes a fork in the road, one can either play the game for a while or one can only play this game due to it being a favorite. I am in the first category, while I love this game I cannot justify playing the same level over and over with increasing speed being the difference. This is contradictory to the spirit of this game which has just those circumstances, this is a direct "port" and nothing has been added or taken away from the original.
If you are tired of spending quarters, save up for this game, the investment will pay off. However it can be said the die-hard players would only play on the original arcade version and scoff at any derivative of their game, so three distinct players of Space Invaders are discovered.