I gave it a try! A rather simple thematic variant of a match/control board game. It's really what you have described, and it works well. The theme is fun, if a bit bland, the drakes are cool and love there almost ball-like design, but the rest around is a very generic. The colors especially feels like they all have the same tone, making the game lack contrast.
The game really does what it does, it has its rules, and you try to win within those parameters. My only issue is really that: Its a digital board game, its no more or less then you get from ONE match. Especially as the moves you can make are rather limited (3-4 I think? Create a new dragon, Move a Dragon, Move a Dragon Uphill, Burn a tree). And while playing against others might bring some create strategic value, its a shame if you don't use the digital-space to create more content.
What I would love to see is the game taking a puzzle like progression, and its an area I feel you can expand the singleplayer experience without adding more features (as that would defeat the purpose of the elegant board-game-design). Have linear progression with "board-challenges" levels, where you play on strange board setups, maybe even the AI has preset pieces etc. still using the rules you have now to win.
A great example of this is Greed Corp, it has the game idea of using a "board-game" design space, but has several levels you progress within those boundaries.