Subjective bugs:

4x3-008 reuses IDEA too soon
4x3-013 reuses OBEY too soon
4x3-016 does not recognize TECH
4x3-018 reuses ITEM too soon
4x3-019 reuses ITCH too soon
4x3-020 spells FUCH which is suggestive
4x3-022 reuses UGLY too soon
4x3-025 reuses KNOB too soon
4x3-026 is too hard
4x3-029 reuses ITCH too soon
4x3-030 does not recognize WIMP
4x3-031 reuses UNDO too soon
4x3-034 does not recognize FIRS
4x3-042 reuses KNOB too soon
4x3-042 reuses VERY too soon

5x3-004 reuses ENJOY too soon

5x4-002 does not recognize ROWED or SOWED