I don't mean this in a condescending sense, even though it might sound it... I compete with a natural tendency to be blunt and frank to the point of rudeness, and the conflation of a "sense of achievement" versus the distribution of (what are known as) gamification attributes, one of which is "achievements".

HiScores are the original gamification. But, ideally, the sense of achievement should be so intrinsic to the play, and the manner in which a player learns to play, that score and time and all other conditions of play are benefits to playing well, not reasons to play.

The best example of this is soccer/football kicky ups. Your first endeavours aren't about how many times you can do it, they're about the joy of controlling the ball in the air. Later, as you realise you're getting better, you'll start counting, briefly, then return (almost instantly) to trying to gain sufficient control to do more height, more spin, more transitions, use more parts of your foot, leg and body, and ever more transitions. You make (and shape) the sense of achievement from the inherent attributes of play, a sense of personal style, feel and talent, and a desire to express yourself within both the limits of physics and yourself.

If you can design a game's mechanics such that it provides this degree of simple cognitive understanding of the potential, and sufficiently flexible mechanics that players can make their own sense of progress and achievement in their skills development, they'll "gamify" it themselves, and begin sharing their "achievements" via the tools they now have, such as video streaming and all the manners in which they can share digital experiences and performances.

In other words, since the rise and rise of Twitch and the subsequent provisions of all manner of streaming on other services and platforms, and Apple (and others) recognising this trend by providing both live streaming and video recording on their devices, simply getting the game fundamentals right makes all the old "traditional" forms of gamification somewhat redundant.

Attempt 3.4: Gamification is nice to have, but not at all necessary, Attempt 4.0: Gamification is, ironically, not at all significant compared to getting the gameplay experience to feel just right in terms of its accessibility, discoverability and expressiveness.

I hope this helps you see you can simply focus on the barebones experience, and later, when folks start expressing themselves within your game, worry about what to "gamify".

For Loopy Blocks, I am making a level creator. Each level will have an unique code that users could share by text, instagram, facebook, snapchat... and then in the future, I plan on opening up my website for users to publish, or taking submissions!

I just played Meteor and I am really liking the gameplay.
If you want, I could publish for you.