Put some dummy enemies
Apply "attackable" concept
Merge pull request #1 from kjirou/put-some-enemies

Put some dummy enemies
Add bundle
Add documents
Fix version
Setup gulp tasks
Update README
Fix build task
Rewrite entity as typescript
Update entity
Rewrite battler
Rewrite player and enemy
Rewrite stage
Rewrite bullet
Rewrite all game domains
Update README
Rename from main to field
Create opening
Add menu