Revert "Update README.md"

This reverts commit 17fe0a01c23e9dfcc5b1818f5887c25b7c113f71.
Revert "Revert "Update README.md""

This reverts commit 1c0255773c62a64fafe8ed3101c7ccc2988315bd.
Reverted "modified tilemap to allow spider to move throughout." to correct an error in the map editor that caused replication of frames.

This reverts commit 7d959a0bfa67f52b8fc42b20c6e00a6343eb3e9f.