The patch 1.0.1 corrects a lot of glitches like the player's sprite problem, the crash when encounter Spamton and secret ending's final boss. Also fix some words problem and rare issues.
That's all.
If you played on the 1.0 and you want to download the 1.0.1 without lost your data, copy and paste the file Save# (# is the number of your save slot) from the old game's folder to the new one.
See you next time !
The development team.