Finishing a simple small game is better than having 9,999 small projects you never finish. That's my opinion. The hardest part of game making is finishing the damn game. The first 50% is always smooth and fun. Ideas flow out quicker and easier then soft serve icecream. Yet once you throw all your mash of ideas in and need to start doing some "real coding" not just prototyping. Then all of a sudden your motivation hits a wall faster than a kamikaze plane.
This is when you gotta push though. I guarantee you'll learn more about game making by finishing that game off. Those final polishing teaks give you so much information back on what's popular and what will do. Even if the game you release is a failure and lots of people don't like it, it still gives you valuable information about your audience and what to work on next. Basically finishing a game gives you your kick start to game making. You gotta take it from there.
I finished a few small test games in school for fun. More practice than anything, but it wasn't till I finished Draw-Play and got it sponsored that I really got the biggest motivation boost possible. It was my first sponsored game, I only got $400 which is ironic because I've gotten thousands for bigger games that have done a lot worse. When it's your first sponsor deal you will get offered a lot less. You have to start somewhere. I then went on to sell the sequels for thousands though and so begun my game making.
FINISH YOUR GAME. Even if you have to force your eyes open. Stab your leg with a pen to force ideas out. Drink copious amounts of coffee to stay focused. Just get it done. Once done you will feel this enourmous burden lift off your shoulders and you realise you could have made it so much better. Finish it, don't realease it just yet, polish it and watch as the last 10% of your game you finish truly makes it shine.
FINISH YOUR UNFINISHED PROJECTS!