I do like a good tower defense game. Is this good? Well, it's interesting and almost playable, so it could have been good.
- For some reason, the first wave of any stage takes a long time to enter the screen. Stage 2 seemingly softlocked the second time I tried to play it, with the first wave failing to appear at all.
- I like the idea with the junctions, this is why I think the game is interesting. However, as it is now, it is both abusable (since you can make the fairies get stuck by spamming it) and hard to use, since it's hard to separate out the fairies carrying letters without also letting through some bad fairies.
- Upgrading the towers doesn't seem to actually cost anything: it just checks that you have the required funds, but doesn't subtract the cost from your resources.
The first two points are the biggest issues, and makes the game hard to even play. To fix the second issue, the fairies might have needed a few extra states to prevent them from taking directions from the same sign twice; that's how I would have solved it, at least.