I've been playing Counter Punch for a little while. I've reached level 21 -- mixed review for 台/つ/日 -- and suddenly I'm unable to enter any answers.
In previous levels, I could type in the answers in hiragana (romaji automatically transformed) but in level 21 it seems to only accept the kanji form of the answers.
For example when it shows a calendar with a 2 on it, I type in ふつか and I get told that it's an error and that I need to enter 二日 instead.
On my phone I don't have a japanese keyboard so I can't directly input kanji.
Sorry for the delayed reply. I have heard of this issue, but it's a somewhat tricky one to nail down because you have to play the game for a LONG time to get it to come up.
Edit: this is not the bug I thought it was, adjusting answer. Looking into it now!
I realize that this is a 11 days later, so it is quite possible that you changed this between here and there, but it's currently set to kanji fill-in-the-blank. If you switch it back to kana, can you replicate the issue now?